Tootfinder

Doubling the magnetorheological effect of magnetic elastomers
Lukas Fischer, Andreas M. Menzel
https://arxiv.org/abs/2507.22777 https://arxiv.org/pdf/2507.…

Doubling the magnetorheological effect of magnetic elastomers
One of the most important properties of soft functionalized magnetic composite materials in view of their technological potential is given by the magnetorheological effect. It describes the change in rheological properties such as the shear modulus by application of external magnetic fields. We demonstrate how computational material design can support in approximately doubling the magnitude of this important phenomenon for magnetic elastomers. Key is to work with two perpendicular magnetic fiel…

Magnetic flux transport via reconnection diffusion in different sonic regimes of interstellar MHD turbulence
C. N. Koshikumo, R. Santos-Lima, M. V. del Valle, E. M. de Gouveia Dal Pino, G. Guerrero, A. Lazarian
https://arxiv.org/abs/2507.21832

Magnetic flux transport via reconnection diffusion in different sonic regimes of interstellar MHD turbulence
Turbulence and magnetic fields are components of the interstellar medium and are interconnected through plasma processes. In particular, the magnetic flux transport in the presence of magneto-hydrodynamic (MHD) turbulence is an essential factor for understanding star formation. The theory of Reconnection Diffusion (RD), based on statistics of Alfvénic turbulence, predicts a dependence of the diffusion coefficient of the magnetic field on the Alfvénic Mach number $M_A$. However, this theory do…

JCMT POL-2 observations of magnetic fields potentially shaped by outflows in the pre-planetary nebulae CRL 618 and OH231.8 4.2
Kate Pattle, Giorgio Savini
https://arxiv.org/abs/2507.21829

JCMT POL-2 observations of magnetic fields potentially shaped by outflows in the pre-planetary nebulae CRL 618 and OH231.8+4.2
We present the first observations of magnetic fields in pre-planetary nebulae (PPNe) made with the POL-2 polarimeter on the James Clerk Maxwell Telescope (JCMT). We observed the PPNe CRL 618 and OH231.8+4.2 in 850 $μ$m polarized light. In both cases, we observe ordered magnetic fields that appear to arise from dusty circumstellar material that has been swept up by the passage of outflows driven by the central post-Asymptotic Giant Branch (post-AGB) star. CRL 618 shows a magnetic field aligned …

Energy Extraction From the Kerr-Bertotti-Robinson Black Hole via Magnetic Reconnection under Circular Plasma and Plunging Plasma
Xiao-Xiong Zeng, Ke Wang
https://arxiv.org/abs/2507.21777

Energy Extraction From the Kerr-Bertotti-Robinson Black Hole via Magnetic Reconnection under Circular Plasma and Plunging Plasma
Recently, a class of exact solutions describing rotating black holes immersed in a uniform magnetic field has been proposed, and various properties of such black holes remain unclear. This paper aims to explore how to extract energy based on the magnetic reconnection mechanism in both the circular orbit region and the plunging region. After introducing the properties of this spacetime, we analyze physical quantities such as the size of the ergoregion, the event horizon, and the boundaries of th…

Antiferromagnetic Order and Magnetic Frustration in the Honeycomb Heavy-Fermion System Ce(Pt$_{1-x}$Pd$_{x}$)$_6$Al$_3$: $^{27}$Al and $^{195}$Pt NMR Studies
Shunsaku Kitagawa, Fumiya Hori, Kenji Ishida, Ryohei Oishi, Yasuyuki Shimura, Takahiro Onimaru, Toshiro Takabatake
https://arxiv.org/abs/2507.22532

Antiferromagnetic Order and Magnetic Frustration in the Honeycomb Heavy-Fermion System Ce(Pt$_{1-x}$Pd$_{x}$)$_6$Al$_3$: $^{27}$Al and $^{195}$Pt NMR Studies
Heavy-fermion systems with magnetic frustration offer a rich platform for investigating the interplay among Kondo screening, magnetic frustration, and quantum criticality. We report comprehensive $^{27}$Al and $^{195}$Pt nuclear magnetic resonance measurements on polycrystalline Ce(Pt$_{1-x}$Pd$_{x}$)$_6$Al$_3$ ($x = 0$, 0.1, 0.2, and 0.3). For $x = 0$, the Knight shift, linewidth, and nuclear spin-lattice relaxation rate reveal a paramagnetic heavy-fermion ground state persisting down to 0.1~K…

High Entropy Engineering of Magnetic Kagome Lattice (Gd,Tb,Dy,Ho,Er)Mn6Sn6
Wenhao Liu, Nikhil Uday Dhale, Youzhe Chen, Pramanand Joshi, Zixin Zhai, Xiqu Wang, Ping Liu, Robert J. Birgeneau, Boris Maiorov, Christopher A. Mizzi, Bing Lv
https://arxiv.org/abs/2507.22809

High Entropy Engineering of Magnetic Kagome Lattice (Gd,Tb,Dy,Ho,Er)Mn6Sn6
The magnetic kagome lattice compound RMn6Sn6 (R=rare earth) is an emerging platform to exploit the interplay between magnetism and topological electronic states where a variety of exciting findings such as flat bands, Dirac points as well as the dramatic dependence of magnetic order on the rare-earth element have been reported. High entropy through rare earth alloying, on the other hand, provides another knob to control over the physical properties in this system. Here, by the marriage of high …

Out-of-equilibrium spinodal-like scaling behaviors across the magnetic first-order transitions of 2D and 3D Ising systems
Andrea Pelissetto, Ettore Vicari
https://arxiv.org/abs/2507.21286

Out-of-equilibrium spinodal-like scaling behaviors across the magnetic first-order transitions of 2D and 3D Ising systems
We study the out-of-equilibrium scaling behavior of two-dimensional and three-dimensional Ising systems, when they are slowly driven across their {\em magnetic} first-order transitions at low temperature $T

Neural network extraction of chromo-electric and chromo-magnetic gluon masses
Jie Mei, Lingxiao Wang, Mei Huang
https://arxiv.org/abs/2507.22012 https://ar…

Neural network extraction of chromo-electric and chromo-magnetic gluon masses
We present a neural network approach to separate the contributions of chromo-electric and chromo-magnetic gluons within the quasi-particle framework. Using dual residual networks, we extract temperature-dependent masses from SU(3) lattice thermodynamic data of pressure and trace anomaly. After incorporating physics regularizations, the trained models reproduce lattice results with high accuracy over $T/T_c \in [1,10]$, capturing both the crossover behavior near $T_c$ and linear scaling at high …

Universal Magnetic Phases in Twisted Bilayer MoTe$_2$
Weijie Li, Evgeny Redekop, Christiano Wang Beach, Canxun Zhang, Xiaowei Zhang, Xiaoyu Liu, Will Holtzmann, Chaowei Hu, Eric Anderson, Heonjoon Park, Takashi Taniguchi, Kenji Watanabe, Jiun-haw Chu, Liang Fu, Ting Cao, Di Xiao, Andrea F. Young, Xiaodong Xu
https://arxiv.org/abs/2507.2235…

Universal Magnetic Phases in Twisted Bilayer MoTe$_2$
Twisted bilayer MoTe$_2$ (tMoTe$_2$) has emerged as a robust platform for exploring correlated topological phases, notably supporting fractional Chern insulator (FCI) states at zero magnetic field across a wide range of twist angles. The evolution of magnetism and topology with twist angle remains an open question. Here, we systematically map the magnetic phase diagram of tMoTe$_2$ using local optical spectroscopy and scanning nanoSQUID-on-tip (nSOT) magnetometry. We identify spontaneous ferrom…

Injection of magnetic helicity in solar cycle 24 and early phase of cycle 25
H. Q. Zhang, S. B. Yang, K. M. Kuzanyan, Axel Brandenburg, H. Q. Xu, D. D. Sokoloff
https://arxiv.org/abs/2507.19122

Injection of magnetic helicity in solar cycle 24 and early phase of cycle 25
The injection of magnetic helicity into the heliosphere during solar cycle 24 and the early phase of cycle 25 has been calculated based on the analysis of a series of synoptic magnetic charts. During the cycle, the injected magnetic helicity is found to be mainly contributed by the magnetic field in active regions. According to Hale's law, the polarities of active regions statistically reverse between solar cycles 24 and 25. We suggest that the dominant source of injected magnetic helicity like…

Modelling magnetic star-planet interaction in the iconic M dwarfs Proxima Centauri, YZ Ceti and GJ 1151
Luis Pe\~na-Mo\~nino, Miguel P\'erez-Torres
https://arxiv.org/abs/2508.20891

Modelling magnetic star-planet interaction in the iconic M dwarfs Proxima Centauri, YZ Ceti and GJ 1151
The unambiguous detection of magnetic star-planet interaction (SPI) via radio observations would provide a novel method for detecting exoplanets and probing their magnetic fields. Although direct radio detection of sub-Jovian planets is hindered by the low frequencies involved, models of sub-Alfvénic SPI predict that Earth-like planets in close-in orbits around M dwarfs may induce detectable emission. Here, we revisit the modelling of the expected radio emission from magnetic star-planet inter…

Ugreen Magflow: Erste Powerbank unterstützt Qi2-Laden mit 25 Watt
Die Magflow Magnetic Power Bank von Ugreen ist eine der ersten, die Ladegeschwindigkeiten von mehr als 15 W bietet. Auch Android-Geräte sollen profitieren.

Quark confinement consistent with holography due to hyperbolic magnetic monopoles and hyperbolic vortices unifiedly reduced from symmetric instantons
Kei-Ichi Kondo
https://arxiv.org/abs/2507.20372

Quark confinement consistent with holography due to hyperbolic magnetic monopoles and hyperbolic vortices unifiedly reduced from symmetric instantons
We give a review on hyperbolic magnetic monopoles and hyperbolic vortices obtained in the unified way through the conformal equivalence by the dimensional reduction from the symmetric instantons with various spatial symmetries in the four-dimensional Euclidean Yang-Mills theory. They are used to understand quark confinement in the sense of the area law of the Wilson loop average in a semi-classical picture from a unified treatment of Atiyah's hyperbolic magnetic monopole and Witten-Manton's hyp…

SOFIA/HAWC Far-infrared Polarimetric Large Area #CMZ Exploration Survey - the Magnetic Field Strength and Morphology in the Sagittarius C Complex: https://iopscience.iop.org/article/10.3847/1538-4357/ade80d -> Galactic Rosetta Stone: https://physicalsciences.uchicago.edu/news/article/galactic-rosetta-stone/

REBCO delamination by transverse electromagnetic stress due to screening current in magnetic field
Jun Lu, Jeremy Levitan, Yu Suetomi, Iain Dixon, Jan Jaroszynski
https://arxiv.org/abs/2507.21301

REBCO delamination by transverse electromagnetic stress due to screening current in magnetic field
REBCO coated conductor has great potential to be used in ultra-high field magnets. Commercial REBCO tapes are strong in the longitudinal direction but prone to delamination by tensile stress in the thickness direction. For high field magnet applications, it is crucial to characterize delamination strength of REBCO conductor and better manage the transverse electromagnetic stress. In this work, the electromagnetic stress in high magnetic fields by screen current is used to study the delamination…

SuperMag: Vision-based Tactile Data Guided High-resolution Tactile Shape Reconstruction for Magnetic Tactile Sensors
Peiyao Hou, Danning Sun, Meng Wang, Yuzhe Huang, Zeyu Zhang, Hangxin Liu, Wanlin Li, Ziyuan Jiao
https://arxiv.org/abs/2507.20002

SuperMag: Vision-based Tactile Data Guided High-resolution Tactile Shape Reconstruction for Magnetic Tactile Sensors
Magnetic-based tactile sensors (MBTS) combine the advantages of compact design and high-frequency operation but suffer from limited spatial resolution due to their sparse taxel arrays. This paper proposes SuperMag, a tactile shape reconstruction method that addresses this limitation by leveraging high-resolution vision-based tactile sensor (VBTS) data to supervise MBTS super-resolution. Co-designed, open-source VBTS and MBTS with identical contact modules enable synchronized data collection of …

Impact of magnetic field-driven anisotropies on the equation of state probed in neutron star mergers
Elias R. Most, Jeffrey Peterson, Luigi Scurto, Helena Pais, Veronica Dexheimer
https://arxiv.org/abs/2506.21696

Impact of magnetic field-driven anisotropies on the equation of state probed in neutron star mergers
Binary neutron star mergers can produce extreme magnetic fields, some of which can lead to strong magnetar-like remnants. While strong magnetic fields have been shown to affect the dynamics of outflows and angular momentum transport in the remnant, they can also crucially alter the properties of nuclear matter probed in the merger. In this work, we provide a first assessment of the latter, determining the strength of the pressure anisotropy caused by Landau level quantization and the anomalous …

Real-time rail vehicle localisation using spatially resolved magnetic field measurements
Niklas Dieckow, Katharina Ostaszewski, Philip Heinisch, Henriette Struckmann, Hendrik Ranocha
https://arxiv.org/abs/2507.19327

Real-time rail vehicle localisation using spatially resolved magnetic field measurements
This work presents two complementary real-time rail vehicle localization methods based on magnetic field measurements and a pre-recorded magnetic map. The first uses a particle filter reweighted via magnetic similarity, employing a heavy-tailed non-Gaussian kernel for enhanced stability. The second is a stateless sequence alignment technique that transforms real-time magnetic signals into the spatial domain and matches them to the map using a similarity measure. Experiments with operational tra…

Tracking the rotation of light magnetic particles in turbulence
Chunlai Wu, Rudie P. J. Kunnen, Ziqi Wang, Xander M. de Wit, Federico Toschi, Herman J. H. Clercx
https://arxiv.org/abs/2506.21769

Tracking the rotation of light magnetic particles in turbulence
Particle-laden turbulence involves complex interactions between the dispersed and continuous phases. Given that particles can exhibit a wide range of properties, such as varying density, size, and shape, their interplay with the flow can lead to various modifications of the turbulence. Therefore, understanding the dynamics of particles is a necessary first step toward revealing the behavior of the multiphase system. Within the context of particle dynamics, accurately resolving rotational motion…

Superconducting flux concentrator coils for levitation of particles in the Meissner state
Robert Smit, Martijn Janse, Eli van der Bent, Thijmen de Jong, Kier Heeck, Jaimy Plugge, Tjerk Oosterkamp, Bas Hensen
https://arxiv.org/abs/2507.20795

Superconducting flux concentrator coils for levitation of particles in the Meissner state
Magnetic levitation of superconductors is a promising platform to study quantum mechanics in the large-mass limit. One major limitation is the weak trapping potential, which results in low vibrational eigenfrequencies and increased susceptibility to low-frequency noise. While generating strong magnetic fields is relatively straightforward, creating a tightly confined harmonic potential - essentially achieving a large magnetic field gradient - remains a significant challenge. In this work, we de…

Non-Relativistic Anisotropic Magnetoresistance with Collinear and Non-Collinear Magnetic Order
Philipp Ritzinger, Ond\v{r}ej Sedl\'a\v{c}ek, Jakub \v{Z}elezn\'y, Karel V\'yborn\'y
https://arxiv.org/abs/2506.22115

Non-Relativistic Anisotropic Magnetoresistance with Collinear and Non-Collinear Magnetic Order
Anisotropic magnetoresistance (AMR) arises from symmetry lowering of the conductivity tensor induced by magnetic order. In simple ferromagnets, AMR is a relativistic effect, relying on spin-orbit interaction (SOC). Here, we demonstrate that a comparable symmetry lowering can also occur in a non-relativistic limit. Using tight-binding models, density functional theory calculations, and Boltzmann transport theory, we investigate systems with multiple magnetic sublattices, including both collinear…

🇺🇦 #NowPlaying on KEXP's #VarietyMix
The Magnetic Fields:
🎵 Fear of Trains
#TheMagneticFields
https://haydenhvghes.bandcamp.com/track/fear-of-trains
https://open.spotify.com/track/5b5dOGe1j7zpaa4OB9HCon

Quantum Interference and Rashba Spin-Orbit Coupling in a Chain of Planar Quantum Rings: Effects on Magnetic and Transport Properties
Armen Harutyunyan
https://arxiv.org/abs/2507.21629

Quantum Interference and Rashba Spin-Orbit Coupling in a Chain of Planar Quantum Rings: Effects on Magnetic and Transport Properties
Magneto-transport properties of a two-dimensional electron gas in a chain of planar quantum rings are investigated under the Rashba spin-orbit interaction and a transverse homogeneous magnetic field. A modulation potential function models the ring-chain periodicity along one direction and the confinement in the perpendicular one. The electron energy minibands collapse into discrete levels with high degeneracy at specific magnetic field values. The Rashba effect significantly influences the syst…

Distorted quarkonia and spin alignment
Guowei Yan, Shu Lin
https://arxiv.org/abs/2507.22684 https://arxiv.org/pdf/2507.22684…

Distorted quarkonia and spin alignment
We study both orbital and spin contributions to quarkonia spin alignment induced by magnetic field in heavy ion collisions. The orbital contribution arises from distortion of quarkonium spatial wave function, and the spin contribution is due to spin states mixing in the magnetic field. We find the spin contribution dominates in heavy ion phenomenology. The subleading orbital contribution offers the possibility of studying structure change of quarkonium in magnetic field.

Proposal for realizing Heisenberg-type quantum-spin models in Rydberg atom quantum simulators
Masaya Kunimi, Takafumi Tomita
https://arxiv.org/abs/2507.22461 https://

Proposal for realizing Heisenberg-type quantum-spin models in Rydberg atom quantum simulators
We investigate the magnetic-field dependence of the interaction between two Rydberg atoms, $|nS_{1/2}, m_J\rangle$ and $|(n+1)S_{1/2}, m_J\rangle$. In this setting, the effective spin-1/2 Hamiltonian takes the form of an {\it XXZ} model. We show that the anisotropy parameter of the {\it XXZ} model can be tuned by applying a magnetic field, and in particular, that it changes drastically near the Förster resonance points. Based on this result, we propose experimental realizations of sp…

Probing Turbulence, Gravity, Supernovae, and Magnetic Field Effects with the 6D Kinematics of Young Stars in Milky Way Star-Forming Regions
Benjamin N. Velguth, Yuan Li, Trung Ha, Yue Hu, Marina Kounkel, Siyao Xu, Robert Gutermuth, Hui Li, Martin D. Weinberg
https://arxiv.org/abs/2507.22107

Probing Turbulence, Gravity, Supernovae, and Magnetic Field Effects with the 6D Kinematics of Young Stars in Milky Way Star-Forming Regions
The dynamics of star forming gas can be affected by many physical processes, such as turbulence, gravity, supernova explosions, and magnetic fields. In this paper, we investigate several nearby star forming regions (Orion, Upper Sco, Taurus, and Perseus) for kinematic imprints of these influences on the newly formed stars. Using Gaia DR3 astrometry and APOGEE DR17 radial velocities, we compute first-order velocity structure functions (VSFs) of young stars in galactic Cartesian coordinates in bo…

Does magnetic field promote or suppress fragmentation in AGN disks? Results from local shearing box simulations with simple cooling
Tsun Hin Navin Tsung, Mitchell C. Begelman, Philip J. Armitage, Yan-Fei Jiang, Hannalore J. Gerling-Dunsmore
https://arxiv.org/abs/2507.21991

Does magnetic field promote or suppress fragmentation in AGN disks? Results from local shearing box simulations with simple cooling
Accretion disks in Active Galactic Nuclei (AGN) are predicted to become gravitationally unstable substantially interior to the black hole's sphere of influence, at radii where the disk is simultaneously unstable to the magnetorotational instability (MRI). Using local shearing box simulations with net vertical flux and a simple cooling prescription, we investigate the effect of magnetic fields on fragmentation in the limit of ideal magnetohydrodyamics. Different levels of in-disk magnetic field …

Global properties and stability of transonic plasma acceleration in the magnetic nozzle
N. Sheth, A. Smolyakov, J. Deguire, S. Pande, P. N. Yushmanov
https://arxiv.org/abs/2506.20880

Global properties and stability of transonic plasma acceleration in the magnetic nozzle
It is shown that transonic plasma acceleration in the converging-diverging magnetic field (magnetic nozzle) follows the unique global solution which is fully defined by the magnetic field. Such solution, which was analytically obtained earlier in the paraxial approximation, is compared here with results of the axisymmetric two-dimensional (rz) magnetohydrodynamics(MHD) simulations. It is shown that analytical solution describes well the region near the axis but also can be applied to arbitrary …

Single-flavor heavy baryons in a strong magnetic field
Gaoqing Cao, Shuang Wu
https://arxiv.org/abs/2507.20636 https://arxiv.org/pdf/2507.20636

Single-flavor heavy baryons in a strong magnetic field
In this work, we study the properties of single-flavor heavy baryons, $Ω_{\rm ccc}$ and $Ω_{\rm bbb}$, in a strong magnetic field. For that sake, we simply treat the baryons as quark-diquark two-body systems, and a systematic formalism is developed to deal with two-body Schr$\ddot{\text o}$dinger equations in a magnetic field. It is found that: 1. The orbital properties of $Ω_{\rm bbb}$ are almost not affected by the magnetic field. 2. $Ω_{\rm ccc}$ is more tightly bound in the presence of …

Development of MR spectral analysis method robust against static magnetic field inhomogeneity
Shuki Maruyama, Hidenori Takeshima
https://arxiv.org/abs/2506.20897

Development of MR spectral analysis method robust against static magnetic field inhomogeneity
Purpose:To develop a method that enhances the accuracy of spectral analysis in the presence of static magnetic field B0 inhomogeneity. Methods:The authors proposed a new spectral analysis method utilizing a deep learning model trained on modeled spectra that consistently represent the spectral variations induced by B0 inhomogeneity. These modeled spectra were generated from the B0 map and metabolite ratios of the healthy human brain. The B0 map was divided into a patch size of subregions, and t…

A Statistical Analysis of Magnetic Parameters in Solar Source Regions of Halo-CMEs with and without SEP events
Xuchun Duan, Ting Li, Yijun Hou, Yang Wang, Yue Li, Yining Zhang, Zheng Sun, Guiping Zhou
https://arxiv.org/abs/2506.21907

A Statistical Analysis of Magnetic Parameters in Solar Source Regions of Halo-CMEs with and without SEP events
Large SEPs can cause adverse space weather hazard to humans technology and such events are especially associated with halo coronal mass ejections (CMEs). But in turn, a significant portion of halo-CMEs are not associated with large SEPs. The objective of this study is to gain an understanding of the source region distinctions between halo-CMEs in SEP and No-SEP events. Among the 176 halo-CMEs observed from 2010-2024, we screen out 45 large SEP events and 131 No-SEP events from this dataset. It …

Investigation of magnetic and magneto-transport properties in non-centrosymmetric antiferromagnetic semimetal GdGaSi
Manikantha Panda, Prabuddha Kant Mishra, Sonali S Pradhan, V. Kanchana, Tapas Paramanik
https://arxiv.org/abs/2506.21938

Investigation of magnetic and magneto-transport properties in non-centrosymmetric antiferromagnetic semimetal GdGaSi
In this work, we investigated the magneto-transport and magnetic properties of GdGaSi, having non-centrosymmetric tetragonal structure, with space group $I4_1md$. Our theoretical results are supported by experimental studies. First-principles calculations reveal that GdGaSi is an antiferromagnetic semimetallic system, characterized by dominant electron-type charge carriers. In addition, the possible nontriviality of the crossing at the Fermi energy is consistent with isostructural LaPtSi-struct…

Strain effects on the fluctuation properties in noncollinear antiferromagnets: a first-principles and macrospin-based study
Mohammad M. Rahman, Farzad Mahfouzi, Matthew W. Daniels, Mark D. Stiles
https://arxiv.org/abs/2507.22275

Strain effects on the fluctuation properties in noncollinear antiferromagnets: a first-principles and macrospin-based study
We present a theoretical investigation of epitaxial strain effects on the magnetic fluctuation properties of Mn$_3$Sn noncollinear antiferromagnets. Employing density functional theory (DFT), we uncover significant strain-induced modifications to key magnetic parameters, including magnetic anisotropy and both bilinear and biquadratic exchange interactions. Our findings reveal that the biquadratic exchange, often neglected, plays a crucial role in defining the magnetic energy landscape and its r…

Hardware acceleration for ultra-fast Neural Network training on FPGA for MRF map reconstruction
Mattia Ricchi, Fabrizio Alfonsi, Camilla Marella, Marco Barbieri, Alessandra Retico, Leonardo Brizi, Alessandro Gabrielli, Claudia Testa
https://arxiv.org/abs/2506.22156

Hardware acceleration for ultra-fast Neural Network training on FPGA for MRF map reconstruction
Magnetic Resonance Fingerprinting (MRF) is a fast quantitative MR Imaging technique that provides multi-parametric maps with a single acquisition. Neural Networks (NNs) accelerate reconstruction but require significant resources for training. We propose an FPGA-based NN for real-time brain parameter reconstruction from MRF data. Training the NN takes an estimated 200 seconds, significantly faster than standard CPU-based training, which can be up to 250 times slower. This method could enable rea…

Calibrating HMI Magnetograms Using an End-to-end Magnetograph Model: #Sun

Duality Symmetry and Anomaly for Gravitational Waves in Curved Spacetime
Adrian del Rio, Javier Olmedo, Ant\'onio Torres Manso
https://arxiv.org/abs/2507.22588 https://

Duality Symmetry and Anomaly for Gravitational Waves in Curved Spacetime
The vacuum Einstein equations admit a formulation closely analogous to the source-free Maxwell theory. In particular, the linearized equations exhibit an electric-magnetic duality symmetry. We develop a framework that makes this analogy manifest by explicitly identifying the electric and magnetic components of perturbative gravitational waves. Within this formulation, we show that duality rotations between these gravitoelectric and gravitomagnetic fields constitute a Noether symmetry of the lin…

Can a convecting magma ocean offer a solution to the puzzling case of core convection in early earth?
Urmi Dutta, Chris J. Davies, Ashley P. Willis
https://arxiv.org/abs/2507.22521

Can a convecting magma ocean offer a solution to the puzzling case of core convection in early earth?
Convective flow in Earth's iron-rich liquid core drives self-sustained dynamo action, generating Earth's magnetic field, which is strongest among all terrestrial planets of the solar system. Rock records show that this magnetic field has been operative in Earth for at least 3.4 billion years (b.y). However, advanced high pressure experiments have revised the value of the thermal conductivity of the outer core, which implies an age for the inner core of less than 1 b.y., when compositional conve…

Magnetic Excitations of a Half-Filled Tl-based Cuprate
I. Bia{\l}o, Q. Wang, J. K\"uspert, X. Hong, L. Martinelli, O. Gerguri, Y. Chan, K. von Arx, O. K. Forslund, W. R. Pude{\l}ko, C. Lin, N. C. Plumb, Y. Sassa, D. Betto, N. B. Brookes, M. Rosmus, N. Olszowska, M. D. Watson, T. K. Kim, C. Cacho, M. Horio, M. Ishikado, H. M. R{\o}nnow, J. Chang
https://

Magnetic Excitations of a Half-Filled Tl-based Cuprate
Strong electron correlations drive Mott insulator transitions. Yet, there exists no framework to classify Mott insulators by their degree of correlation. Cuprate superconductors, with their tunable doping and rich phase diagrams, offer a unique platform to investigate the evolution of those interactions. However, spectroscopic access to a clean half-filled Mott-insulating state is lacking in compounds with the highest superconducting onset temperature. To fill this gap, we introduce a pristine,…

Direct signatures of $d$-level hybridization and dimerization in magnetic adatom chains on a superconductor
Lisa M. R\"utten, Eva Liebhaber, Gael Reecht, Kai Rossnagel, Katharina J. Franke
https://arxiv.org/abs/2507.21847

Direct signatures of $d$-level hybridization and dimerization in magnetic adatom chains on a superconductor
Magnetic adatom chains on superconductors provide a platform to explore correlated spin states and emergent quantum phases. Using low-temperature scanning tunneling spectroscopy, we study the distance-dependent interaction between Fe atoms on 2H-NbSe$_2$. While single atoms exhibit four Yu-Shiba-Rusinov states and partially occupied $d$ levels consistent with a $S=2$ spin state, the spin is quenched when two Fe atoms reside in nearest neighbor lattice sites, where the $d$ levels of the atoms hy…

Revision of conservative lower bound on intergalactic magnetic field from Fermi and Cherenkov telescope observations of extreme blazars
J. Blunier, A. Neronov, D. Semikoz
https://arxiv.org/abs/2506.22285

Revision of conservative lower bound on intergalactic magnetic field from Fermi and Cherenkov telescope observations of extreme blazars
Joint observations of extreme blazars with Fermi Large Area Telescope (LAT) and Imaging Atmospheric Cherenkov telescopes (IACT) have been previously used to derive lower bounds on intergalactic magnetic field (IGMF). We update these previous bounds using a set of extreme blazars that are detected in the Very-High-Energy (VHE, photon energies above 100 GeV) band by both Fermi/LAT and IACTs. We measure IGMF-dependent suppression of secondary delayed gamma-ray flux from electron-positron pairs dep…

Confusion-driven machine learning of structural phases of a flexible, magnetic Stockmayer polymer
Dilina Perera, Samuel McAllister, Joan Josep Cerd\`a, Thomas Vogel
https://arxiv.org/abs/2506.20899

Confusion-driven machine learning of structural phases of a flexible, magnetic Stockmayer polymer
We use a semi-supervised, neural-network based machine learning technique, the confusion method, to investigate structural transitions in magnetic polymers, which we model as chains of magnetic colloidal nanoparticles characterized by dipole-dipole and Lennard-Jones interactions. As input for the neural network we use the particle positions and magnetic dipole moments of equilibrium polymer configurations, which we generate via replica-exchange Wang--Landau simulations. We demonstrate that by m…

In-Plane Magnetic Anisotropy and Large topological Hall Effect in Self-Intercalated Ferromagnet Cr1.61Te2
Yalei Huang, Na Zuo, Zheyi Zhang, Xiangzhuo Xing, Xinyu Yao, Anlei Zhang, Haowei Ma, Chunqiang Xu, Wenhe Jiao, Wei Zhou, Raman Sankar, Dong Qian, Xiaofeng Xu
https://arxiv.org/abs/2507.22397

In-Plane Magnetic Anisotropy and Large topological Hall Effect in Self-Intercalated Ferromagnet Cr1.61Te2
Self-intercalated chromium tellurides Cr1+xTe2 have garnered growing attention due to their high-temperature ferromagnetism, tunable spin structures and air stability, all of which are vital for versatile applications in next-generation memory and information technology. Here, we report strong magnetic anisotropy and a large topological Hall effect (THE) in self-intercalated Cr1.61Te2 single crystals, which are both highly desirable properties for future spintronic applications. Our results dem…

Diffusion Denoiser-Aided Gyrocompassing
Gershy Ben-Arie, Daniel Engelsman, Rotem Dror, Itzik Klein
https://arxiv.org/abs/2507.21245 https://arxiv.org/pdf/2…

Diffusion Denoiser-Aided Gyrocompassing
An accurate initial heading angle is essential for efficient and safe navigation across diverse domains. Unlike magnetometers, gyroscopes can provide accurate heading reference independent of the magnetic disturbances in a process known as gyrocompassing. Yet, accurate and timely gyrocompassing, using low-cost gyroscopes, remains a significant challenge in scenarios where external navigation aids are unavailable. Such challenges are commonly addressed in real-world applications such as autonomo…

Spin structures and phase diagrams of the spin-$\frac{5}{2}$ triangular-lattice antiferromagnet Na$_2$BaMn(PO$_4$)$_2$ under magnetic field
N. Biniskos, F. J. dos Santos, M. Stekiel, K. Schmalzl, E. Ressouche, D. Svit\'ak, A. Labh, M. Vali\v{s}ka, N. Marzari, P. \v{C}erm\'ak
https://arxiv.org/abs/2508.21021

Spin structures and phase diagrams of the spin-$\frac{5}{2}$ triangular-lattice antiferromagnet Na$_2$BaMn(PO$_4$)$_2$ under magnetic field
We combine single-crystal neutron diffraction studies and Monte Carlo simulations to determine the spin structures and finite-temperature phase diagram of the spin-5/2 triangular-lattice antiferromagnet Na$_2$BaMn(PO$_4$)$_2$ in magnetic field. With the application of a magnetic field in two different directions, namely along the $c$-axis and in the $ab$-plane of the trigonal symmetry, we track the evolution of the spin structure through changes of the magnetic propagation vector. We account fo…

Fourth-order quantum master equations reveal that spin-phonon decoherence undercuts long magnetization relaxation times in single-molecule magnets
Alessandro Lunghi
https://arxiv.org/abs/2507.20716

Fourth-order quantum master equations reveal that spin-phonon decoherence undercuts long magnetization relaxation times in single-molecule magnets
Spin-phonon interaction is known to drive magnetic relaxation in solid-state systems, but little evidence is available on how it affects coherence time. Here we extend fourth-order quantum master equations to account for coherence terms and describe the full effect of up to two-phonon processes on spin dynamics. We numerically implement this method fully ab initio for a single-molecule magnet with large magnetization blocking temperature and show that while strong axial magnetic anisotropy ensu…

Semi-Implicit Continuum Kinetic Modeling of Weakly Collisional Parallel Transport in a Magnetic Mirror
M. Dorf, M. Dorr, V. Geyko, D. Ghosh, M. Umansky, J. Angus
https://arxiv.org/abs/2507.19729

Semi-Implicit Continuum Kinetic Modeling of Weakly Collisional Parallel Transport in a Magnetic Mirror
We present implicit-explicit (IMEX) kinetic simulations of weakly collisional parallel plasma transport in magnetic mirror configurations using the continuum code \textsc{COGENT}. The numerical scheme employs a Jacobian-free Newton--Krylov method with algebraic multigrid preconditioning to overcome the severe time-step limitations imposed by strong mirror forces in fully explicit schemes. Applied to parameters relevant to the WHAM mirror experiment, the IMEX approach enables time steps up to $2…

Feasibility of ultra-high-energy cosmic ray backtracking through sparse local measurements of the Galactic magnetic field
S. Romanopoulos, M. Mastorakis, V. Pavlidou
https://arxiv.org/abs/2507.21277

Feasibility of ultra-high-energy cosmic ray backtracking through sparse local measurements of the Galactic magnetic field
Planned and ongoing campaigns for the acquisition of high-quality local measurements of the Galactic magnetic field (GMF) at interstellar cloud locations have generated intense interest in the use of such measurements to accurately backtrack Ultra High-Energy Cosmic Rays (UHECR) through the Milky Way, a crucial aspect of charged-particle astronomy. However, the inherent sparsity of these measurements raises concerns regarding the feasibility of this approach. We assessed the achievable accuracy…

Magnetic Field Induced Band Deformation in a Lieb Lattice:Aharonov-Bohm Caging and Zeeman Splitting
Nana Chang, Xiaoji Zhou
https://arxiv.org/abs/2508.20451 https://

Magnetic Field Induced Band Deformation in a Lieb Lattice:Aharonov-Bohm Caging and Zeeman Splitting
Flat-band systems are highly sensitive to external perturbations, providing a route to study unconventional localization, transport, and spin physics. Lieb lattice, a two-dimensional geometry with an inherent flat band, exemplifies this behavior and is experimentally realizable in ultracold atoms, photonic arrays, and superconducting circuits. In this work, we present a comprehensive study of magnetic field induced band deformation in the Lieb lattice by jointly considering orbital Peierls phas…

Structure of heavy quarkonia under strong magnetic field
Ahmad Jafar Arifi, Kei Suzuki
https://arxiv.org/abs/2507.18894 https://arxiv.org/pdf/2507.18894

Structure of heavy quarkonia under strong magnetic field
We investigate the structural modifications of heavy quarkonia in the presence of strong magnetic fields using a constituent quark model. By incorporating the effects of spin mixing and quark Landau levels, we employ a nonrelativistic Hamiltonian that captures the essential features of quark dynamics in a magnetic field. The two-body Schrödinger equation is solved using the cylindrical Gaussian expansion method, which respects the cylindrical symmetry induced by a magnetic field. We extract th…

Pivot of the Emerging Bipolar Magnetic Region in the Birth of Sigmoidal Solar Active Regions
Ronald L. Moore, Sanjiv K. Tiwari, V. Aparna, Navdeep K. Panesar, Alphonse C. Sterling, Talwinder Singh
https://arxiv.org/abs/2507.20042

Pivot of the Emerging Bipolar Magnetic Region in the Birth of Sigmoidal Solar Active Regions
We present an augmentation to longstanding evidence from observations and MHD modeling that (1) every solar emerging bipolar magnetic region (BMR) is made by an emerging omega-loop flux rope, and (2) twist in the flux-rope field makes the emerged field sigmoidal. Using co-temporal full-disk coronal EUV images, magnetograms, and continuum images from Solar Dynamics Observatory (SDO), we found and tracked the emergence of 42 emerging single-BMR sigmoidal active regions (ARs) that have sunspots in…

Whole-brain Transferable Representations from Large-Scale fMRI Data Improve Task-Evoked Brain Activity Decoding
Yueh-Po Peng, Vincent K. M. Cheung, Li Su
https://arxiv.org/abs/2507.22378

Whole-brain Transferable Representations from Large-Scale fMRI Data Improve Task-Evoked Brain Activity Decoding
A fundamental challenge in neuroscience is to decode mental states from brain activity. While functional magnetic resonance imaging (fMRI) offers a non-invasive approach to capture brain-wide neural dynamics with high spatial precision, decoding from fMRI data -- particularly from task-evoked activity -- remains challenging due to its high dimensionality, low signal-to-noise ratio, and limited within-subject data. Here, we leverage recent advances in computer vision and propose STDA-SwiFT, a tr…

Replaced article(s) found for hep-th. https://arxiv.org/list/hep-th/new
[1/2]:
- Shapes of magnetic monopoles in effective $SU(2)$ models
Petr Bene\v{s}, Filip Blaschke

A visual approach to global accretion disk instabilities
Nicolas Brughmans, Rony Keppens
https://arxiv.org/abs/2507.22672 https://arxiv.org/pdf/2507.22672

A visual approach to global accretion disk instabilities
For over 30 years, the Magneto-Rotational Instability has been accepted as the mechanism driving accretion disk turbulence. Its physical basis is well understood, where an interplay between centrifugal forces and magnetic tension transfers angular momentum between oppositely displaced fluid elements. In this work, we revisit this picture in global disk models and various magnetic field topologies and generalise it to non-axisymmetric instabilities like the Super-Alfvénic Rotational Instability…

Magnetic effect on the evolution of an eccentric and inclined orbit
Xing Wei
https://arxiv.org/abs/2507.20093 https://arxiv.org/pdf/2507.20093

Magnetic effect on the evolution of an eccentric and inclined orbit
We provide a method to calculate the evolution of an eccentric and inclined orbit under the magnetic effect. Taking the unipolar interaction as an example, we study both coplanar and inclined orbits. We calculate the Lorentz force and then the changes in orbital energy and angular momentum. Combined with the total energy dissipation we write down the evolution equations of semi-major axis, eccentricity, inclination and spin. This set of equations can be used to study the orbital and spin evolut…

Strong correlation behavior and Strong coupling superconductivity in (Ti1/4Hf1/4Nb1/4Ta1/4)1-xNix with the rich magnetic element Ni
Zijun Huang, Tong Li, Longfu Li, Rui Chen, Zaichen Xiang, Shuangyue Wang, Jingjun Qin, Yucheng Li, Lingyong Zeng, Dinghua Bao, Huixia Luo
https://arxiv.org/abs/2507.21793

Strong correlation behavior and Strong coupling superconductivity in (Ti1/4Hf1/4Nb1/4Ta1/4)1-xNix with the rich magnetic element Ni
Searching for new superconductors, especially unconventional superconductors, has been studied extensively for decades but remains one of the major outstanding challenges in condensed matter physics. Medium/high-entropy alloys (MEAs-HEAs) are new fertile soils of unconventional superconductors and generate widespread interest and questions on the existence of superconductivity in highly disordered materials. Here, we report on the effect of Ni-doped on the crystal structure and superconductivit…

Quantum Imaging of Ferromagnetic van der Waals Magnetic Domain Structures at Ambient Conditions
Bindu, Amandeep Singh, Amir Hen, Lukas Drago Cavar, Sebastian Maria Ulrich Schultheis, Shira Yochelis, Yossi Paltiel, Andrew F. May, Angela Wittmann, Mathias Klaui, Dmitry Budker, Hadar Steinberg, Nir Bar-Gill
https://arxiv.org/abs/2507.20245

Quantum Imaging of Ferromagnetic van der Waals Magnetic Domain Structures at Ambient Conditions
Recently discovered 2D van der Waals magnetic materials, and specifically Iron-Germanium-Telluride ($\rm Fe_{5}GeTe_{2}$), have attracted significant attention both from a fundamental perspective and for potential applications. Key open questions concern their domain structure and magnetic phase transition temperature as a function of sample thickness and external field, as well as implications for integration into devices such as magnetic memories and logic. Here we address key questions using…

Out-of-time-order correlators bridge classical transport and quantum dynamics
Sophia N. Fricke, Haiyan Mao, Manas Sajjan, Ashok Ajoy, Velencia Witherspoon, Sabre Kais, Jeffrey A. Reimer
https://arxiv.org/abs/2508.20235

Out-of-time-order correlators bridge classical transport and quantum dynamics
The out-of-time-order correlator (OTOC) has emerged as a central tool for quantifying decoherence across wide-ranging physical platforms. Here we demonstrate its direct measurement in a classical ensemble using nuclear magnetic resonance (NMR) with a modulated gradient spin echo (MGSE) sequence and extend the method into a multidimensional correlation to track exchange phenomena. Position is encoded through magnetic field gradients and momentum through the velocity autocorrelation function, ena…

Impact of rotation on magnetic field stability and orientation in isolated neutron stars
Fabrizio Venturi Pi\~nas, Anson Ka Long Yip, Patrick Chi-Kit Cheong, Milton Ruiz
https://arxiv.org/abs/2508.20220

Impact of rotation on magnetic field stability and orientation in isolated neutron stars
Neutron stars are the most compact horizonless objects in the Universe, exhibiting the strongest known magnetic fields. They are potential sources of coincident gravitational waves and electromagnetic radiation across the entire spectrum. However, the internal configuration of their magnetic fields and the mechanisms that stabilize them remain open questions. As a step forward in understanding the timescale for the emergence of magnetic instabilities that disrupt stellar field configurations, w…

Isotope Enrichment and Element Separation by Self Generated Magnetic Centrifuge Fields in Ultrafast Laser Ablation
Peter P. Pronko, Paul A. Van Rompay
https://arxiv.org/abs/2508.20299

Isotope Enrichment and Element Separation by Self Generated Magnetic Centrifuge Fields in Ultrafast Laser Ablation
A self-consistent model is developed to explain the anomalously large enrichment of nickel isotopes observed in ablation plumes from ultrafast laser irradiation of solid surfaces. The model is based on the spontaneous creation of a magnetic centrifuge in the ablation plume and the associated cyclotron rotation of plasma ions with rotation rates on the order of 10^9 radians per second. Mass separation occurs around the radial coordinate of cylindrical symmetry with longitudinal axis normal to th…

Static and Dynamical Characterization of Ground State Phases Induced by Frustration and Magnetic Field in the Spin-1 Orthogonal Dimer Chain
Ernest Ong, Dhiman Bhowmick, Sharoz Schezwen, Pinaki Sengupta
https://arxiv.org/abs/2507.21771

Static and Dynamical Characterization of Ground State Phases Induced by Frustration and Magnetic Field in the Spin-1 Orthogonal Dimer Chain
The spin-$1$ orthogonal dimer chain is investigated using the Density Matrix Renormalization Group (DMRG) algorithm. A transformation to a basis that uses the local eigenstates of the orthogonal dimers, while retaining the local spin states for the parallel spins, allows for more effective implementation of the symmetries, as well as mitigating the entanglement bias of DMRG. A rich ground state phase diagram is obtained in the parameter space spanned by the ratio of inter- to intra-dimer intera…

Schwarzschild Black Holes Immersed in Born-Infeld Magnetic Fields and Their Observational Signatures
Yiqian Chen, Guangzhou Guo, Benrong Mu, Peng Wang
https://arxiv.org/abs/2506.19581

Schwarzschild Black Holes Immersed in Born-Infeld Magnetic Fields and Their Observational Signatures
We investigate the influence of Born-Infeld (BI) nonlinear electrodynamics on magnetic field configurations, photon orbits, and black hole shadows for Schwarzschild black holes immersed in magnetic fields. Assuming that the BI magnetic fields are asymptotically uniform and aligned with the polar axis, we solve the nonlinear magnetic field equations numerically using pseudospectral methods. Our analysis shows that nonlinear electromagnetic effects become prominent near the event horizon, particu…

COCONUT: A time-evolving coronal model with an energy decomposition strategy
Haopeng Wang, Stefaan Poedts, Andrea Lani, Luis Linan, Tinatin Baratashvili, Hyun-Jin Jeong, Rayan Dhib, Yuhao Zhou, Yucong Li, Mahdi Najafi-Ziyazi, Juan Wang, Brigitte Schmieder, Wensi Wang
https://arxiv.org/abs/2508.20423

COCONUT: A time-evolving coronal model with an energy decomposition strategy
In this paper, we propose an energy decomposition method to improve the numerical stability of time-evolving magnetohydrodynamic (MHD) coronal models, enabling them to resolve the stronger magnetic field during solar maxima without significantly filtering out small-scale structures from the observed magnetograms.We advance the decomposed energy that excludes the magnetic energy, instead of the total energy, in time. It avoids the operation of subtracting a large magnetic energy from the total e…

A Hierarchy of Topological and Superconducting States in Rhombohedral Hexalayer Graphene
Ron Q. Nguyen, Hai-Tian Wu, Erin Morissette, Naiyuan J. Zhang, Peiyu Qin, Kenji Watanabe, Takashi Taniguchi, Aaron W. Hui, Dima E. Feldman, J. I. A. Li
https://arxiv.org/abs/2507.22026

A Hierarchy of Topological and Superconducting States in Rhombohedral Hexalayer Graphene
Superconductivity and the quantum Hall effect are conventionally viewed as mutually exclusive: the former is suppressed by magnetic fields, while the latter relies on them. Here, we report the surprising coexistence of these two phenomena in rhombohedral hexalayer graphene. In this system, a superconducting phase is not destroyed -- but instead stabilized -- by an out-of-plane magnetic field. Strikingly, this superconducting state coexists and competes with a sequence of quantum Hall states tha…

Microscopic origin of the magnetic interactions and their experimental signatures in altermagnetic La$_2$O$_3$Mn$_2$Se$_2$
Laura Garcia-Gassull, Aleksandar Razpopov, Panagiotis Peter Stavropoulos, Igor I Mazin, Roser Valent\'i
https://arxiv.org/abs/2506.21661

Microscopic origin of the magnetic interactions and their experimental signatures in altermagnetic La$_2$O$_3$Mn$_2$Se$_2$
Altermagnets (AM) are a recently introduced type of magnets, with no net magnetization like antiferromagnets, but displaying a non-relativistic Zeeman splitting in reciprocal space like ferromagnets. One of the lately discussed models to realize AM is the inverse Lieb lattice (ILL). Initially suggested as a purely theoretical construct, the ILL occurs in real materials such as La$_2$O$_3$Mn$_2$Se$_2$. However, AM on the ILL requires 90$^\circ$ nearest-neighbor superexchange to be {\it antiferro…

Magnetic field of a ring-like shape molecular cloud
Dana Alina, Adel Umirbayeva, Yasuo Doi, Soichiro Jo, Yue Hu, Alex Lazarian, Janik Karoly, Tie Liu, Koji S. Kawabata, Alua Mukhash, Danial Zhumagayir, Tomori Hori, Tetsuharu Maruta, Ryo Imazawa, Tatsuya Nakaoka, Mahito Sasada
https://arxiv.org/abs/2507.19281

Magnetic field of a ring-like shape molecular cloud
We present a detailed study of the magnetic field structure in the G111 molecular cloud, a ring-like filamentary cloud within the NGC 7538 region. We utilized interstellar dust polarization from the Planck telescope to trace large-scale field orientations, starlight extinction polarization from the Kanata telescope to probe the cloud's magnetic field after foreground subtraction, and velocity gradients derived from CO isotopologues, observed with the IRAP 30m telescope, to examine dense regions…

Hybrid fluid-kinetic cylindrical equilibria with axial background magnetic field
D. A. Kaltsas, A. I. Kuiroukidis, G. N. Throumoulopoulos
https://arxiv.org/abs/2507.20248 https:…

Hybrid fluid-kinetic cylindrical equilibria with axial background magnetic field
Self-consistent, one-dimensional quasineutral screw-pinch equilibria are constructed within a hybrid model that couples fluid electrons with kinetic ions governed by the Vlasov equation. The equilibria depend on the radial coordinate perpendicular to the cylindrical axis and include an axial background magnetic field. Adopting a three-parameter ion distribution function depending on the energy and the canonical momenta conjugate to the two ignorable coordinates, the problem is reduced to a set …

Inducing ferromagnetism by structural engineering in a strongly spin-orbit coupled oxide
Ji Soo Lim, Carmine Autieri, Merit Spring, Martin Kamp, Amar Fakhredine, Pavel Potapov, Daniel Wolf, Sergii Pylypenko, Axel Lubk, Johannes Schultz, Nicolas Perez, B\"orge Mehlhorn, Louis Veyrat, Mario Cuoco, Fadi Choueikan, Philippe Ohresser, Bernd B\"uchner, Giorgio Sangiovanni, Ralph Claessen, Michael Sing

Inducing ferromagnetism by structural engineering in a strongly spin-orbit coupled oxide
Magnetic materials with strong spin-orbit coupling (SOC) are essential for the advancement of spin-orbitronic devices, as they enable efficient spin-charge conversion, complex magnetic structures, spin-valley physics, topological phases and other exotic phenomena. 5d transition-metal oxides such as SrIrO3 feature large SOC, but usually show paramagnetic behavior due to broad bands and a low density of states at the Fermi level, accompanied by a relatively low Coulomb repulsion. Here, we unveil …

Genuine multipartite entanglement as a probe of many-body localization in disordered spin chains with Dzyaloshinskii-Moriya interactions
Triyas Sapui, Keshav Das Agarwal, Tanoy Kanti Konar, Leela Ganesh Chandra Lakkaraju, Aditi Sen De
https://arxiv.org/abs/2507.22795

Genuine multipartite entanglement as a probe of many-body localization in disordered spin chains with Dzyaloshinskii-Moriya interactions
We demonstrate that the quenched average genuine multipartite entanglement (GME) can approach its maximum value in the ergodic phase of a disordered quantum spin model. In contrast, GME vanishes in the many-body localized (MBL) phase, both in equilibrium and in the long-time dynamical steady state, indicating a lack of useful entanglement in the localized regime. To establish this, we analyze the disordered Heisenberg spin chain subjected to a random magnetic field and incorporating two- and th…

Anisotropic Magnetism in Gd$_2$B$_5$
Maximilien F. Debbas, Takehito Suzuki, Alex H. Mayo, Mun K. Chan, Joseph G. Checkelsky
https://arxiv.org/abs/2507.22325 https://

Anisotropic Magnetism in Gd$_2$B$_5$
We report the synthesis of single crystals of Gd$_2$B$_5$ through a ruthenium-gadolinium flux method. The Gd$_2$B$_5$ system is a member of the monoclinic $P21/c$ (No. 14) space group and realizes lattices of gadolinium atoms in the $(1\,0\,0)$ plane. We characterized the sample through orientation-dependent electrical transport, magnetization, magnetic torque, and heat capacity measurements to probe the magnetic anisotropy of the system and map out its phase diagram. Gd$_2$B$_5$ realizes two z…

Multipolar magnetic configuration: a trace of post-mergers events in circumstellar disks around FS CMa Stars
A. Moranchel-Basurto, D. Kocakova, M. Cemeljic, R. O. Chametla, F. J. Sanchez-Salcedo, I. Bermejo-Lozano
https://arxiv.org/abs/2508.18974

Multipolar magnetic configuration: a trace of post-mergers events in circumstellar disks around FS CMa Stars
Context: Observations suggest that magnetic fields of disk-bearing stars may have non-dipolar configurations. However, the influence of these configurations on magnetospheric accretion remains poorly understood. Aims: We aim to simulate magnetospheric accretion incorporating non-dipolar and strong magnetic field. Our model is informed by observations of IRAS 17449+2320, a post-merger belonging to the group of FS CMa stars, which indicate a dominant dipolar magnetic field with an additional quad…

Functional renormalization group study of anomalous magnetic moment in a low energy effective theory
Rui Wen, Chuang Huang, Mei Huang
https://arxiv.org/abs/2506.20246

Functional renormalization group study of anomalous magnetic moment in a low energy effective theory
The quark anomalous magnetic moments (AMMs) are investigated in a 2-flavor low-energy effective theory within the functional renormalization group (FRG) approach under an external magnetic field. The Schwinger formalism is adopted for quark propagators, and Fierz-complete four-quark scatterings are self-consistently included through the renormalization group flows. We find that the quark AMMs are dynamically generated with the chiral symmetry breaking, and the magnitude of the AMM of the down q…

Monopole Traps for Position-Based Information Coding
Prakash Timsina, Andres Chappa, Deema Alyones, Boris Kiefer, Ludi Miao
https://arxiv.org/abs/2507.22315 https://

Monopole Traps for Position-Based Information Coding
We propose a spin-ice-based heterostructure capable of encoding magnetic monopole quasiparticle positions for non-volatile information storage applications. Building upon two-dimensional magnetic monopole gases formed at the interface between 2-in-2-out spin ice and all-in-all-out antiferromagnetic pyrochlore iridate, the design introduces a 3-in-1-out/1-in-3-out fragmented barrier layer into the spin-ice matrix, defining two energetically stable monopole traps. The occupancy of these traps can…

Structure-Property Correlations in Sb, Ge, and Ga Doped AlFe$_2$B$_2$ for Magnetocaloric Applications
R. Preyadarshini, S. Kavita, Ashutosh Kumar, D. Sivaprahasam
https://arxiv.org/abs/2506.22422

Structure-Property Correlations in Sb, Ge, and Ga Doped AlFe$_2$B$_2$ for Magnetocaloric Applications
This study investigates the effects of Sb, Ge, and Ga doping in AlFe$_2$B$_2$ on magnetic and magneto-caloric properties. Samples of AlFe$_2$B$_2$ and AlFe$_{1.9}$M$_{0.1}$B$_2$ (M= Ge, Ga and Sb) with 20\% excess Al were synthesized by arc melting, and the powder processed were investigated for their phase constituents, microstructure, magnetic and magneto-caloric effect. The parent compounds prepared showed the AlFe$_2$B$_2$ phase with a FeB secondary phase. However, in Sb and Ga-doped sample…

Magnetic Flux Emergence in Binary Neutron Star Remnants
Jacob Fields, David Radice, Peter Hammond
https://arxiv.org/abs/2507.18695 https://arxiv.org/pdf/25…

Magnetic Flux Emergence in Binary Neutron Star Remnants
Using high-resolution AthenaK simulations of a twisted toroidal flux tube, we study the flux emergence of magnetic structures in the shear layer of a hot massive neutron star typical of a binary neutron star remnant. High-resolution simulations demonstrate that magnetic buoyant instabilities allow for emergence only for extremely large magnetic fields significantly exceeding $10^{17}~\mathrm{G}$, and more typical fields around $10^{16}~\mathrm{G}$ are instead dominated by hydrodynamic effects. …

De Haas - van Alphen study of the Dirac nodal-line semimetal candidate TaPtTe$_5$
Maximilian Daschner, F. Malte Grosche
https://arxiv.org/abs/2507.21633 https://

De Haas - van Alphen study of the Dirac nodal-line semimetal candidate TaPtTe$_5$
We report a quantum oscillation study in the Dirac nodal-line semimetal candidate TaPtTe$_5$. The Fermi surface is probed via magnetic torque measurements with the magnetic field applied in the crystallographic a-b and b-c planes. The experimentally determined de Haas - van Alphen frequencies are consistent with results from band structure calculations. This study serves as an extension to the scarce quantum oscillation data on TaPtTe$_5$ currently present in the literature.

Magnetism of kagome metals $\left(\text{Fe}_{1-x} \text{Co}_{x}\right) \text{Sn}$ studied by $\mu$SR
Yipeng Cai, Sungwon Yoon, Qi Sheng, Guoqiang Zhao, Eric Francis Seewald, Sanat Ghosh, Julian Ingham, Abhay Narayan Pasupathy, Raquel Queiroz, Hechang Lei, Yaofeng Xie, Pengcheng Dai, Takashi Ito, Ruyi Ke, Robert J. Cava, Sudarshan Sharma, Mathew Pula, Graeme M. Luke, Kenji M. Kojima, Yasutomo J. Uemura

Magnetism of kagome metals $\left(\text{Fe}_{1-x} \text{Co}_{x}\right) \text{Sn}$ studied by $μ$SR
We study the magnetic properties of the metallic kagome system $\left(\mathrm{Fe}_{1-x} \mathrm{Co}_{x}\right) \mathrm{Sn}$ by a combination of Muon Spin Relaxation ($μ\mathrm{SR}$), magnetic susceptibility and Scanning Tunneling Microscopy (STM) measurements, in single crystal specimens with Co concentrations $\mathrm{x}=0,0.11,0.8$. In the undoped antiferromagnetic compound FeSn, we find possible signatures for a previously unidentified phase that sets in at $T^*\sim 50$ K, well beneath the …

Electromagnetic and Centrifugal Effects on Plasma Acceleration in the Magnetic Nozzle
A. I. Smolyakov, A. Sabo, S. I. Krasheninnikov, P. N. Yushmanov
https://arxiv.org/abs/2506.19647

Electromagnetic and Centrifugal Effects on Plasma Acceleration in the Magnetic Nozzle
Plasma flow and acceleration in the converging-diverging magnetic field configuration, such as magnetic nozzle in electric propulsion and open magnetic mirrors for fusion applications are considered. This work analyses plasma acceleration in the magnetic nozzle with an emphasis on the electromagnetic effects and centrifugal forces due to plasma rotation. Intrinsic coupling of the azimuthal rotation and azimuthal magnetic field is analyzed, and additional plasma acceleration due to the conversio…

Impact of the ambipolar diffusion in the structuration of the magnetic Rayleigh Taylor instability with oblique magnetic field
E. Callies, V. Guillet, A. Marcowith, Z. Meliani, P. Lesaffre
https://arxiv.org/abs/2506.19672

Impact of the ambipolar diffusion in the structuration of the magnetic Rayleigh Taylor instability with oblique magnetic field
Aims. We investigate the impact of ambipolar diffusion on the development of the Rayleigh-Taylor instability (RTI) with an oblique magnetic field in the incompressible limit. Methods. We developed a general bi-fluid framework comprising charges and neutrals with the specific feature of differing gravity between charges and neutrals. We derived the perturbed magnetohydrodynamic (MHD) equations and obtained an analytic dispersion relation for an oblique magnetic field. The growth rate was then ev…

Topological magneto-optics in the non-coplanar antiferromagnet Co_{1/3}NbS_2: Imaging and writing chiral magnetic domains
E. Kirstein, H. Park, I. Martin, J. F. Mitchell, N. Ghimire, S. A. Crooker
https://arxiv.org/abs/2507.18829

Topological magneto-optics in the non-coplanar antiferromagnet Co_{1/3}NbS_2: Imaging and writing chiral magnetic domains
Despite its tiny net magnetization, the antiferromagnetic (AFM) van der Waals material Co$_{1/3}$NbS$_2$ exhibits a large transverse Hall conductivity $σ_{xy}$ even at zero applied magnetic field, which arises, as recently shown, from the topological nature of its non-coplanar ``tetrahedral'' AFM order. This triple-Q magnetic order can be regarded as the short-lengthscale limit of a magnetic skyrmion lattice, and has an intrinsic spin chirality. Here we show, using optical wavelengths spanning…

Multiferroicity and 180$^\circ$ domain switching in LaFeO$_3$ via Antisite Defects
Souren Majani, Ulrich Aschauer
https://arxiv.org/abs/2507.21681 https://…

Multiferroicity and 180$^\circ$ domain switching in LaFeO$_3$ via Antisite Defects
Materials with coexisting and coupled ferroelectric and magnetic orders are rare. Here we show, using density functional theory calculations, that inducing Fe$_\mathrm{La}$ antisites into non-ferroelectric and antiferromagnetic LaFeO$_3$ renders the material at the same time ferroelectric and ferrimagnetic. Even more excitingly, we observe a direct coupling between the ferroelectric and ferrimagnetic polarization, the latter being switchable by the former. While on average the magnetic moments …

Optical Spectroscopy of the Most Compact Accreting Binary Harboring a Magnetic White Dwarf and a Hydrogen-rich Donor
Ilkham Galiullin, Antonio C. Rodriguez, Kareem El-Badry, Ilaria Caiazzo, Paula Szkody, Pranav Nagarajan, Samuel Whitebook
https://arxiv.org/abs/2508.20170

Optical Spectroscopy of the Most Compact Accreting Binary Harboring a Magnetic White Dwarf and a Hydrogen-rich Donor
Accreting white dwarfs in close binary systems, commonly known as cataclysmic variables (CVs), with orbital periods below the canonical period minimum ($\approx$ 80 minutes) are rare. Such short periods can only be reached if the donor star in the CV is either significantly evolved before initiating mass transfer to the white dwarf (WD) or metal-poor. We present optical photometry and spectroscopy of Gaia19bxc, a high-amplitude variable identified as a polar CV with an exceptionally short orbit…

Magneto-cubic and magneto-linear dependence observed in an in-plane anomalous Hall magnet
Ayano Nakamura, Shinichi Nishihaya, Mitsuru Akaki, Motoi Kimata, Kenta Sudo, Yuki Deguchi, Hsiang Lee, Tadashi Yoneda, Masaki Kondo, Hiroaki Ishizuka, Masashi Tokunaga, Masaki Uchida
https://arxiv.org/abs/2507.21458

Magneto-cubic and magneto-linear dependence observed in an in-plane anomalous Hall magnet
The Hall effect, particularly that arising from in-plane magnetic field, has recently emerged as a sensitive probe of quantum geometric properties in solids. Especially in trigonal systems, in-plane anomalous Hall effect (AHE) can be explicitly induced by nontrivial off-diagonal coupling between the magnetic field and the Hall vector on the principal plane. Here we elucidate multipolar dependence of the off-diagonal coupling in the in-plane AHE, by systematically measuring on the (001) principa…

Nonlinear Hall effect in topological Dirac semimetals in parallel magnetic field
Maxim Dzero, Maxim Khodas, Alex Levchenko, Vladyslav Kozii
https://arxiv.org/abs/2508.20159 http…

Nonlinear Hall effect in topological Dirac semimetals in parallel magnetic field
We compute the second-harmonic response of two-dimensional topological Dirac semimetals subjected to an external in-plane magnetic field. The quantum kinetic equation for the Wigner distribution function is derived and then solved to evaluate the second-order electric-field contributions to the current density. Both the Berry curvature dipole and the field-induced terms in the current are analyzed across a broad range of model parameters. We propose that our theory can be tested experimentally …

Magnetic Field Configurations in Binary Neutron Star Mergers II: Inspiral, Merger and Ejecta
William Cook, Eduardo M. Guti\'errez, Sebastiano Bernuzzi, David Radice, Boris Daszuta, Jacob Fields, Peter Hammond, Harshraj Bandyopadhyay, Maximilian Jacobi
https://arxiv.org/abs/2508.19342

Magnetic Field Configurations in Binary Neutron Star Mergers II: Inspiral, Merger and Ejecta
We perform a series of simulations of magnetised Binary Neutron Star mergers, with varying magnetic field topologies in the initial data, as well as varying Equations of State, and mass ratios. In this paper, a companion paper to arXiv:2506.18995, we analyse the impact of the initial field configuration on the gravitational wave signal, the amplification of the magnetic field, and the ejected material. We investigate the dependence of the phase evolution of the gravitational wave in the post-me…

Field driven Metal-Insulator transition in rhombohedral Bismuth and Arsenic crystals
N. K. Karn, Mukul S. Laad, V. P. S. Awana
https://arxiv.org/abs/2507.21661 https://

Field driven Metal-Insulator transition in rhombohedral Bismuth and Arsenic crystals
The metal to insulator (MIT) transition is accompanied with huge changes in physical responses by the control and tuning of experimental parameters like doping, pressure, chemical composition, and magnetic field. Here, we study the magnetic field driven MIT for two pnictides in their elemental form, namely Arsenic and Bismuth. At low temperatures, Bismuth shows an unusual behaviour of a re-entrant IMT at high fields in addition to a higher temperature MIT at smaller fields. However, Arsenic sho…

Quantum Criticality by Interaction Frustration in a Square-Planar Lattice
Yi-Qiang Lin, Chang-Chao Liu, Jia-Xin Li, Bai-Jiang Lv, Kai-Xin Ye, Jia-Wen Zhang, Si-Qi Wu, Ya-Nan Zhang, Ye Chen, Jia-Yi Lu, Jing Li, Hua-Xun Li, Hao Li, Yi Liu, Cao Wang, Yun-Lei Sun, Hao Jiang, Hui-Qiu Yuan, Guang-Han Cao
https://arxiv.org/abs/2507.22362

Quantum Criticality by Interaction Frustration in a Square-Planar Lattice
We report experimental and theoretical investigations on ThCr$_2$Ge$_2$C, a metallic compound in which Cr$_2$C planes form a square-planar lattice. Neutron powder diffraction, magnetization, and specific heat measurements reveal no evidence of long-range magnetic order or short-range spin freezing down to 70~mK. Quantum critical behavior was indicated through logarithmic divergences in both the magnetic susceptibility and the specific heat divided by temperature. Resistivity measurements exhibi…

Magnetic structure and asymmetric eruption of a 500 Mm filament rooted in weak-field regions
Stefan Purkhart, Astrid M. Veronig, Robert Jarolim, Karin Dissauer, Julia K. Thalmann
https://arxiv.org/abs/2508.18121

Magnetic structure and asymmetric eruption of a 500 Mm filament rooted in weak-field regions
We performed a detailed analysis of the magnetic structure and asymmetric eruption of a large (about 500 Mm) inverse S-shaped filament partially located in AR 13229 on February 24, 2023. We linked the filament's pre-eruptive magnetic configuration to its highly asymmetric eruption dynamics and the formation of a large-scale coronal dimming in a weak-field region (mean unsigned flux of about 5 G). To reconstruct the coronal magnetic field, we applied a physics-informed neural network (PINN)-base…

High-Frequency and Microwave Magnetic Properties of Ni$_{0.5}$Zn$_{0.5}$Fe$_2$O$_4$ Spinel Ferrite Ceramics
M. Kempa, V. Bovtun, V. Kukhar, S. Solopan, A. Belous, O. Vyunov, Y. Yakymenko, S. Kamba
https://arxiv.org/abs/2506.20477

High-Frequency and Microwave Magnetic Properties of Ni0.5Zn0.5Fe2O4 Spinel Ferrite Ceramics
Magnetic properties of the Ni0.5Zn0.5Fe2O4 (NZF) spinel ferrite ceramics were studied over a broad frequency range (1 MHz - 50 GHz). Between 10 MHz and 2 GHz, strong temperature-dependent resonance-like magnetic permeability dispersion was observed and attributed to the magnetic domain-wall dynamics. It is responsible for the high magnetic losses, absorption and shielding ability of NZF, and provides high nonlinearity and tunability of the permeability under a weak magnetic field. The attenuati…

A Multimodal Tiered Magnetic Polarity Inversion Features Dataset for Space Weather Forecasting
Ziba Khani, Anli Ji, Manolis K. Georgoulis, Berkay Aydin
https://arxiv.org/abs/2508.17195

A Multimodal Tiered Magnetic Polarity Inversion Features Dataset for Space Weather Forecasting
This article presents a publicly available, multimodal, tiered magnetic polarity inversion lines (MPILs) dataset extracted from the Solar Dynamics Observatory's (SDO) Helioseismic and Magnetic Imager (HMI) Active Region Patches (SDO/HMI HARP) between May 2010 and April 2025. The dataset comprises four distinct tiers, each generated by running our detection methodology with four different magnetic field strength thresholds to capture nuanced variations in MPIL features at multiple levels of deta…

Incommensurate magnetic order arising from frustrated interchain interactions in the spin-1/2 chain compound AgCuVO$_4$
A. Hromov, A. Zorko, M. Gomil\v{s}ek, I. Puente Orench, L. Keller, T. Shiroka, A. Prokofiev, M. Pregelj
https://arxiv.org/abs/2507.19207

Incommensurate magnetic order arising from frustrated interchain interactions in the spin-1/2 chain compound AgCuVO$_4$
Quantum spin chains with competing interactions offer a platform where low dimensionality and frustration--both acting to suppress magnetic order--intersect. We studied magnetic ordering in the spin-1/2 chain compound AgCuVO$_4$ using muon spin spectroscopy and neutron diffraction. Long-range magnetic order emerges at $T_N = 2.0(1)$ K, which is $\sim$1/200 of the dominant intrachain coupling $J$ and $\sim$1/15 of the interchain interactions. The collinear incommensurate amplitude-modulated magn…

The Role of Magnetic Reconnection in the Structure & Dynamics of Fast Coronal Mass Ejections
Brian T. Welsch, C. R. DeVore
https://arxiv.org/abs/2508.17208 https://

The Role of Magnetic Reconnection in the Structure & Dynamics of Fast Coronal Mass Ejections
Both observations and models of flare-associated coronal mass ejections (CMEs) suggest that magnetic reconnection in an ejection's wake substantially increases the net, outward Lorentz force accelerating the CME. A stronger outward force can cause a feedback loop, driving further magnetic reconnection in a "reconnective instability." The flux accretion model captures this by relating reconnected flux (Delta Phi_rec) and magnetic field strength (B_CME) to increased outward Lorentz force (Delta F…

High-Throughput Mapping of Magnetic Properties via the on-the-fly XMCD spectroscopy in a Combinatorial Fe-Co-Ni Film
Y. Yamasaki, N. Sasabe, Y. Ishii, Y. Sekiguchi, A. Sumiyoshiya, Y. Tanimoto, Y. Kotani, T. Nakamura, H. Nomura
https://arxiv.org/abs/2506.20958

High-Throughput Mapping of Magnetic Properties via the on-the-fly XMCD spectroscopy in a Combinatorial Fe-Co-Ni Film
High-throughput X-ray magnetic circular dichroism (XMCD) spectroscopy was conducted on Fe-Co-Ni compositionally graded films to systematically analyze the variation of magnetic properties as a function of composition. On-the-fly XMCD measurement enabled rapid spectral acquisition. Measurement time was reduced approximately tenfold compared to conventional stepwise methods, while maintaining high precision. The obtained XMCD spectra were processed using the Savitzky-Golay denoising technique, an…

SARD: A YOLOv8-Based System for Solar Active Region Detection with SDO/HMI Magnetograms
Jinhui Pan, Jiajia Liu, Shaofeng Fang, Rui Liu
https://arxiv.org/abs/2507.21866 https://

SARD: A YOLOv8-Based System for Solar Active Region Detection with SDO/HMI Magnetograms
Solar active regions are where sunspots are located and photospheric magnetic fluxes are concentrated, therefore being the sources of energetic eruptions in the solar atmosphere. The detection and statistics of solar active regions have been forefront topics in solar physics. In this study, we developed a solar active region detector (SARD) based on the advanced object detection model YOLOv8. First, we applied image processing techniques including thresholding and morphological operations to 69…

Crystalline electric field and large anomalous Hall effect in the candidate topological material CeGaSi
Rajesh Swami, Daloo Ram, Anusree C. V, V. Kanchana, Z. Hossain
https://arxiv.org/abs/2507.20733

Crystalline electric field and large anomalous Hall effect in the candidate topological material CeGaSi
We report a comprehensive investigation of CeGaSi single crystals, including magnetic, thermodynamic, electronic, and magnetotransport properties. The powder x-ray diffraction refinement revealed that CeGaSi crystallizes in LaPtSi-type tetragonal structure with space group I41md. The electrical resistivity data show a metallic nature with a sharp drop occurring around T_m = 11 K, revealing a magnetic phase transition, which is confirmed by magnetic susceptibility and heat capacity data. The mag…

Accurate Screening of Functional Materials with Machine-Learning Potential and Transfer-Learned Regressions: Heusler Alloy Benchmark
Enda Xiao, Terumasa Tadano
https://arxiv.org/abs/2508.20556

Accurate Screening of Functional Materials with Machine-Learning Potential and Transfer-Learned Regressions: Heusler Alloy Benchmark
A machine learning-accelerated high-throughput (HTP) workflow for the discovery of magnetic materials is presented. As a test case, we screened quaternary and all-$d$ Heusler compounds for stable compounds with large magnetocrystalline anisotropy energy ($E_{\mathrm{aniso}}$). Structure optimization and evaluation of formation energy and distance to hull convex were performed using the eSEN-30M-OAM interatomic potential, while local magnetic moments, phonon stability, magnetic stability, and $E…

The Growth and Decay of Individual Sunspots and Pores
Andrey Tlatov
https://arxiv.org/abs/2506.21698 https://arxiv.org/pdf/2506.21698…

The Growth and Decay of Individual Sunspots and Pores
An analysis of the photometric growth and decay rates of sunspots and pores was carried out. According to the \textit{Solar Dynamics Observatory/Helioseismic and Magnetic Imager} (SDO/HMI) data for the period 05.2010-03-2025, $\approx 3.5\cdot 10^{\rm 5}$ sunspots and pores were detected and their evolution tracked. The growth and decay rates of sunspots depend non-monotonically on the area. For small-area sunspots $S \lesssim 50$ $μ$sh, a rapid increase in velocity is observed with increasing…

Evolution of magnetic bubble domains in the uniaxial ferromagnet CeRu$_2$Ga$_2$B inferred from the Hall effect and ac magnetic susceptibility
Peter E. Siegfried, Mark Maus, Alexander C. Bornstein, Dirk Wulferding, JeehoonKim, Ryan E. Baumbach, Eric D. Bauer, Filip Ronning, and Minhyea Lee
https://arxiv.org/abs/2508.16020

Evolution of magnetic bubble domains in the uniaxial ferromagnet CeRu$_2$Ga$_2$B inferred from the Hall effect and ac magnetic susceptibility
We study the Hall effect, AC magnetic susceptibility ($χ_{\rm ac}$), and magnetic force microscopy of the uniaxial ferromagnet CeRu$_2$Ga$_2$B with a centrosymmetric crystal structure. We observe a finite topological Hall effect (THE) within the ordered phase before the magnetization is polarized by applied field. By comparing the field dependences of the area fraction of the magnetic bubbles, the derivative of $χ_{\rm ac}$, and the THE signal, we deduce that the magnetic bubbles of CeRu$_2$G…

Accuracy and Limitations of Machine-Learned Interatomic Potentials for Magnetic Systems: A Case Study on Fe-Cr-C
E. O. Khazieva, N. M. Chtchelkatchev, R. E. Ryltsev
https://arxiv.org/abs/2507.18935

Accuracy and Limitations of Machine-Learned Interatomic Potentials for Magnetic Systems: A Case Study on Fe-Cr-C
Machine-learned interatomic potentials (MLIPs) have become the gold standard for atomistic simulations, yet their extension to magnetic materials remains challenging because spin fluctuations must be captured either explicitly or implicitly. We address this problem for the technologically vital Fe-Cr-C system by constructing two deep machine learning potentials in DeePMD realization: one trained on non-magnetic DFT data (DP-NM) and one on spin-polarised DFT data (DP-M). Extensive validation aga…

Structure and dynamics of the internetwork solar chromosphere: results of a small-scale dynamo simulation
D. Przybylski, R. Cameron, S. K. Solanki, M. Rempel, S. Danilovic, J. Leenaarts
https://arxiv.org/abs/2508.19809

Structure and dynamics of the internetwork solar chromosphere: results of a small-scale dynamo simulation
The heating and structure of the solar chromosphere depends on the underlying magnetic field, among other parameters. The lowest magnetic flux of the solar atmosphere is found in the quiet Sun internetwork and is thought to be provided by the small-scale dynamo (SSD) process. We aim to understand the chromospheric structure and dynamics in a simulation with purely SSD generated magnetic fields. We perform a 3D radiation-magnetohydrodynamic (rMHD) simulation of the solar atmosphere, including th…

Magnetic Field Induced Nonlinear Transport in LaTiO$_3$/SrTiO$_3$ Interfaces
Aidan Steineman, Maxim Khodas, Maxim Dzero
https://arxiv.org/abs/2507.18854 https://

Magnetic Field Induced Nonlinear Transport in LaTiO$_3$/SrTiO$_3$ Interfaces
Motivated by the recent experimental measurements of the nonlinear longitudinal resistance of the spin-orbit coupled electron gas in the (111) LaTiO$_3$/SrTiO$_3$ interfaces under external in-plane magnetic field [G. Tuvia \emph{et al.}, Phys. Rev. Lett. 132, 146301 (2024)], we formulate a theory of nonlinear electronic transport based on the analysis of the quantum kinetic equation for the Wigner distribution function. Specifically, we evaluate the magnetic field dependence of the second harmo…