Tootfinder

Cryogenic magnetization dynamics in tensile-strained ultrathin yttrium iron garnets with tunable magnetic anisotropy
Jihyung Kim, Dongchang Kim, Seung-Gi Lee, Yung-Cheng Li, Jae-Chun Jeon, Jiho Yoon, Sachio Komori, Ryotaro Arkakwa, Tomoyasu Taniyama, Stuart S. P. Parkin, Kun-Rok Jeon
https://arxiv.org/abs/2507.12776

Cryogenic magnetization dynamics in tensile-strained ultrathin yttrium iron garnets with tunable magnetic anisotropy
We report a significant reduction of low-temperature damping losses in tensile-strained, ultrathin Y3Fe5O12 (YIG) films grown by pulsed laser deposition, exhibiting ultralow damping constants and tunable magnetic anisotropy. Comparative broadband FMR measurements show that tensile-strained YIG films on Gd3Sc2Ga3O12 (GSGG) retain low damping even at nanometer thicknesses and cryogenic temperatures, outperforming relaxed films on Gd3Ga5O12. Based on static magnetometry measurements and microstruc…

Analyzing Black-Hole Ringdowns with Orthonormal Modes
Soichiro Morisaki, Hayato Motohashi, Motoki Suzuki, Daiki Watarai
https://arxiv.org/abs/2507.12376 ht…

Analyzing Black-Hole Ringdowns with Orthonormal Modes
The ringdown signal following a BH merger can be modeled as a superposition of BH QNMs, offering a clean setup for testing gravitational theories. In particular, detecting multiple QNMs enables consistency checks of their frequencies and damping times, serving as a test of General Relativity -- a technique known as black hole spectroscopy. However, incorporating additional QNMs introduces challenges such as increased parameter correlations and higher computational costs in data analysis. To add…

What happens when bees can’t buzz right? Nature starts falling apart #nature

What happens when bees can’t buzz right? Nature starts falling apart
High heat and heavy metals dampen a bumblebee’s trademark buzz, threatening pollen release and colony chatter. Tiny sensors captured up-to-400-hertz tremors that falter under environmental stress, raising alarms for ecosystems and sparking ideas for pollination robots.

Guten Morgen Wedding! U-Bahnhof Afrikanische Straße

Damping LFOs: Grid Following with Power Oscillation Damping vs. Grid Forming vs. PSS
Tamojit Chakraborty, Anamitra Pal, Sam Maleki
https://arxiv.org/abs/2505.24204

Damping LFOs: Grid Following with Power Oscillation Damping vs. Grid Forming vs. PSS
Low-frequency oscillations (LFOs) present a significant challenge to the stability and reliability of power systems, especially in grids with a high penetration of renewable energy sources. Traditional grid-following (GFL) inverters have proven less effective in damping such oscillations. This paper presents a GFL-power plant controller with an auxiliary power oscillation damping control for damping LFOs. This approach is compared with a traditional power system stabilizer (PSS) for a two-area …

"It seemed tariffs were already boosting inflation and dampening growth at the margin, albeit not to a sufficient degree to tip the economy into recession," writes Josh Barro.
"Now the jobs numbers are also showing significant weakness, even though they're not yet showing the bottom falling out of the labor market.
The last remaining bullish economic indicator is the stock market.
Like Furman, I can't explain why stocks are doing so well in spite o…

Well, This Jobs Report Clarifies Some Things
Trump will get his rate cut, but there's little other good news for the president.

Evolution models with time-dependent coefficients in friction and viscoelastic damping terms
Halit Sevki Aslan
https://arxiv.org/abs/2506.24058 https://

Evolution models with time-dependent coefficients in friction and viscoelastic damping terms
We study the following Cauchy problem for the linear wave equation with both time-dependent friction and time-dependent viscoelastic damping: \begin{equation} \label{EqAbstract}\tag{$\ast$} \begin{cases} u_{tt}- Δu + b(t)u_t - g(t)Δu_t=0, &(t,x) \in (0,\infty) \times \mathbb{R}^n, \\ u(0,x)= u_0(x),\quad u_t(0,x)= u_1(x), &x \in \mathbb{R}^n. \end{cases} \end{equation} Our goal is to derive decay estimates for higher order energy norms of solutions to this problem. We focus on the interplay b…

TL;DR Amazon's SES in sandbox mode only sends to validated addresses and identities defined in the configuration.
https://winkelwagen.de/2025/05/29/aws-ses-message-rejected-email-address-is-not-verified/

AWS SES Message rejected: Email address is not verified.
I configured one of our Magento 2 stage instances today to use Amazon SES to send emails instead of dumping them into mailhog. But I got the following error: Message rejected: Email address is not …

Thickness-Dependent Spin Pumping in YIG/W$_{90}$Ti$_{10}$ Bilayers
Marielle Hachem, Zeinab Harajli, Samih Isber, Mohammad Haidar
https://arxiv.org/abs/2507.06831

Thickness-Dependent Spin Pumping in YIG/W$_{90}$Ti$_{10}$ Bilayers
We investigate the spin pumping efficiency in YIG/YIG/W$_{90}$Ti$_{10}$ bilayers by measuring the thickness dependence of both the YIG and WTi layers using broadband ferromagnetic resonance (FMR) spectroscopy. The deposition of a 5-nm WTi layer leads to enhanced Gilbert damping in thinner YIG films, indicating efficient spin current injection. From the spin pumping contribution to the damping of the YIG/WTi bilayer, we determine an effective spin mixing conductance of $ 3.3 \times 10^{18}~\math…

External charged debris in a flowing plasma : charge fluctuation induced complexity
Bikramjit Joardar, Hitendra Sarkar, Madhurjya P. Bora
https://arxiv.org/abs/2506.18687

External charged debris in a flowing plasma : charge fluctuation induced complexity
In this work, we investigate the response of a flowing e-i plasma to embedded external charged debris, focusing on the periodic debris charge fluctuations that can trigger complex phenomena such as chaos and nonlinear Landau damping. We employ both kinetic and fluid simulations to analyse the plasma response to the time-dependent debris charge. Our findings indicate that the nature of the nonlinear response can be considerably different for fluctuating positively charged external debris from ne…