Stress-tunable spin-wave dynamics in superellipse-shaped FeGa nanostructures

IF 3.6 2区物理与天体物理 Q2 PHYSICS, APPLIED

Applied Physics Letters Pub Date : 2025-07-21 DOI:10.1063/5.0278169

Eduardo Saavedra, Helmunt Vigo-Cotrina, Carlos Saji, David Laroze, Juan Escrig

引用次数: 0

Abstract

Through micromagnetic simulations, we investigate the high-frequency dynamic properties of FeGa nanostructures with superellipse geometries, focusing on the dynamic susceptibility and the spatial profiles of the resonant modes under stress-induced anisotropy. Two distinct equilibrium states are identified: an in-plane magnetic configuration aligned along the x-axis and a vortex configuration. The results reveal a direct correlation between the number and frequencies of resonant modes and the minimum energy magnetic state, both governed by the system's physical parameters. These findings offer insights for the design of stress-tunable, high-frequency magnetic microwave devices.

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超椭圆形FeGa纳米结构的应力可调自旋波动力学

通过微磁模拟，我们研究了具有超椭圆几何形状的FeGa纳米结构的高频动态特性，重点研究了应力诱导各向异性下的动态磁化率和谐振模式的空间分布。确定了两种不同的平衡状态：沿x轴排列的平面内磁性配置和涡旋配置。结果表明，谐振模式的数量和频率与最小能量磁态之间存在直接关系，两者都受系统物理参数的控制。这些发现为应力可调高频磁微波器件的设计提供了见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Applied Physics Letters 物理-物理：应用

CiteScore

6.40

自引率

10.00%

发文量

1821

审稿时长

1.6 months

期刊介绍： Applied Physics Letters (APL) features concise, up-to-date reports on significant new findings in applied physics. Emphasizing rapid dissemination of key data and new physical insights, APL offers prompt publication of new experimental and theoretical papers reporting applications of physics phenomena to all branches of science, engineering, and modern technology. In addition to regular articles, the journal also publishes invited Fast Track, Perspectives, and in-depth Editorials which report on cutting-edge areas in applied physics. APL Perspectives are forward-looking invited letters which highlight recent developments or discoveries. Emphasis is placed on very recent developments, potentially disruptive technologies, open questions and possible solutions. They also include a mini-roadmap detailing where the community should direct efforts in order for the phenomena to be viable for application and the challenges associated with meeting that performance threshold. Perspectives are characterized by personal viewpoints and opinions of recognized experts in the field. Fast Track articles are invited original research articles that report results that are particularly novel and important or provide a significant advancement in an emerging field. Because of the urgency and scientific importance of the work, the peer review process is accelerated. If, during the review process, it becomes apparent that the paper does not meet the Fast Track criterion, it is returned to a normal track.