Tootfinder

What is Rachel Sennott Even Doing? Full Episode by Kyle MacLachlan
#podcast

The Very Faint X-ray Transient 4XMM J174610.7-290020 at the Galactic center
Giovanni Stel, Gabriele Ponti, Nathalie Degenaar, Lara Sidoli, Sandro Mereghetti, Kaya Mori, Tong Bao, Giulia Illiano, Samaresh Mondal, Mark Reynolds, Chichuan Jin, Tianying Lian, Shifra Mandel, Simone Scaringi, Shuo Zhang, Grace Sanger-Johnson, Rudy Wijnands, Jon M. Miller, Jamie Kennea, Zhenlin Zhu

The Very Faint X-ray Transient 4XMM J174610.7-290020 at the Galactic center
Very Faint X-ray Transients (VFXTs) are a class of X-ray binary systems that exhibit occasional outbursts with peak X-ray luminosities (L_X< 1e36 erg s^-1) much lower than typical X-ray transients. On 22nd February 2024, during its daily Galactic center monitoring, Swift-XRT detected a VFXT, 7 arcmin from Sgr A* dubbing it Swift J174610--290018. We aim to characterize the outburst that occurred in 2024, and a second, distinct outburst in 2025, to understand the nature and accretion flow propert…

Search for Active and Inactive Ion Insertion Sites in Organic Crystalline Materials
Harshan Reddy Gopidi, Alae Eddine Lakraychi, Abhishek A. Panchal, Yiming Chen, V. S. Chaitanya Kolluru, Jiaqi Wang, Ying Chen, Liu Jue, Kamila Wiaderek, Maria K. Y. Chan, Yan Yao, Pieremanuele Canepa
https://arxiv.org/abs/2510.00278

Search for Active and Inactive Ion Insertion Sites in Organic Crystalline Materials
The position of mobile active and inactive ions, specifically ion insertion sites, within organic crystals, significantly affects the properties of organic materials used for energy storage and ionic transport. Identifying the positions of these atom (and ion) sites in an organic crystal is difficult, especially when the element has a low X-ray scattering power, such as lithium (Li) and hydrogen, which are difficult to detect with powder X-ray diffraction (XRD) methods. First-principles calcula…

Lithium depth profiling in NMC/Graphite commercial coin cells under high C-rate cycling
Naisargi Kanabar, Seiichiro Higashiya, Daniele Cherniak, Devendra Sadana, Stephen Bedell, Haralabos Efstathiadis
https://arxiv.org/abs/2509.25697

Lithium depth profiling in NMC/Graphite commercial coin cells under high C-rate cycling
This study examines lithium distribution and its evolution in both anode and cathode materials of commercial lithium-ion coin cells subjected to high C-rate cycling, providing insights into lithium loss, trapping, and plating mechanisms. Cells were cycled at 1C to 3C rates, and post-mortem analysis were performed using Li nuclear reaction Analysis (Li-NRA), x-ray diffraction (XRD), and scanning electron microscopy (SEM) equipped with energy-dispersive x-ray spectroscopy (EDS). Li-NRA using the …

Structural, optical, and electrical properties of Cu-doped NiO films synthesized by spray pyrolysis for potential gas sensing applications
Eka Nurfani, Grace Grace, Mahardika Yoga Darmawan, Resti Marlina, Jumaeda Jatmika, Asnan Rinovian, Aditya Rianjanu
https://arxiv.org/abs/2509.24197

Structural, optical, and electrical properties of Cu-doped NiO films synthesized by spray pyrolysis for potential gas sensing applications
Cu-doped NiO thin films were deposited on ITO substrates via spray pyrolysis at 450 °C for 1.5 minutes. XRD confirmed a cubic NiO structure, with Cu incorporation reducing crystallite size, increasing interplanar spacing, and expanding the lattice parameter, indicating successful substitution of Cu ions. Optical analysis showed a slight bandgap reduction from 3.70 to 3.65 eV, while PL revealed lower emission intensity, suggesting enhanced defect states and suppressed carrier recombination. Ram…

Probing spectral variability in NGC 4490 ULX-8 over 24 years of XMM-Newton, Chandra and Swift-XRT observations
Tarang Vashisht, Aru Beri, Tanuman Ghosh, Aman Upadhyay, Vikram Rana
https://arxiv.org/abs/2510.11415

Probing spectral variability in NGC 4490 ULX-8 over 24 years of XMM-Newton, Chandra and Swift-XRT observations
We present comprehensive spectral and timing results of 14 Chandra, 6 XMM-Newton and 19 Swift-XRT observations of the ultraluminous X-ray source NGC 4490 ULX-8, spanning from 2000 to 2024. We model the source spectra using absorbed power-law and absorbed multicolour disc blackbody models. The best-fit photon indices span 0.92-2.68, with typical uncertainties ranging from $\pm$0.1 to $\pm$1 depending on data quality. The inner disk temperature range from 0.97 to 1.69 keV, consistent with blackbo…

Enhanced thermopower in a magnetic semiconductor EuTe4 with multiple charge-density-wave instabilities/
Hidefumi Takahashi, Kiichiro Yoshida, Akitoshi Nakano, Shintaro Ishiwata
https://arxiv.org/abs/2508.16017

Enhanced thermopower in a magnetic semiconductor EuTe4 with multiple charge-density-wave instabilities/
We investigate the layered magnetic semiconductor EuTe4, focusing on its intricate charge-density wave (CDW) states near and above room temperature through single-crystal X-ray diffraction (XRD), magnetic, and thermoelectric measurements.The XRD measurement revealed that the CDW state inducing the polar lattice distortion persists even at 650 K, demonstrating its remarkable thermal stability. Notably, the Seebeck coefficient near room temperature reaches values exceeding 500 uVK-1. This large S…

Investigating Temporal Features in Swift GRB Afterglows: A Comparative Study of UVOT and XRT Data
Amit K. Ror, S. B. Pandey, S. R. Oates, Rahul Gupta, Amar Aryan, A. J. Castro-Tirado, Sudhir Kumar
https://arxiv.org/abs/2509.07560

Investigating Temporal Features in Swift GRB Afterglows: A Comparative Study of UVOT and XRT Data
This study presents a statistical analysis of optical light curves (LCs) of 200 UVOT-detected GRBs from 2005 to 2018. We have categorised these LCs based on their distinct morphological features, including early flares, bumps, breaks, plateaus, etc. Additionally, to compare features across different wavelengths, we have also included XRT LCs in our sample. The early observation capability of UVOT has allowed us to identify very early flares in 21 GRBs preceding the normal decay or bump, consist…

Electrode modified domain morphology in ferroelectric capacitors revealed by X-ray microscopy
Megan O. Hill Landberg, Bixin Yan, Huaiyu Chen, Efe Ipek, Morgan Trassin, Jesper Wallentin
https://arxiv.org/abs/2508.20925

Electrode modified domain morphology in ferroelectric capacitors revealed by X-ray microscopy
Ferroelectric thin films present a powerful platform for next generation computing and memory applications. However, domain morphology and dynamics in buried ferroelectric stacks have remained underexplored, despite the importance for real device performance. Here, nanoprobe X-ray diffraction (nano-XRD) is used to image ferroelectric domains inside BiFeO3-based capacitors, revealing striking differences from bare films such as local disorder in domain architecture and partial polarization reori…

Synthesis and Characterization of Mg doped ZnFe$_2$O$_4$
Kemi Y. Adewale, Itegbeyogene P. Ezekiel
https://arxiv.org/abs/2508.13203 https://arxiv.org/pdf/25…

Synthesis and Characterization of Mg doped ZnFe$_2$O$_4$
Single-phase Mg-doped ZnFe$_2$O$_4$ nanoparticles with x= 0, 0.3, 0.5, 0.7 have been prepared by the glycol-thermal method without any subsequent calcination. The crystallite size, microstructure and magnetic properties of the prepared nanoparticles were studied using X-ray diffraction (XRD), high resolution scanning electron microscope (TEM), Mossbauer spectroscopy and vibrating sample magnetometer at room temperature. The XRD results revealed the production of a sharp single cubic spinel stru…