Magnon signatures of multidimensional reconfigurations in multilayer square artificial spin ices

IF 3.6 2区物理与天体物理 Q2 PHYSICS, APPLIED

Applied Physics Letters Pub Date : 2025-01-14 DOI:10.1063/5.0246456

Vinayak Shantaram Bhat, M. Benjamin Jungfleisch

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引用次数: 0

Abstract

We present an all-electrical, broadband spin-wave spectroscopy study of three-dimensional square artificial spin ices composed of dipolarly coupled ferromagnetic layers of varying thicknesses separated by a non-magnetic spacer. Our experiments, in the saturated regime, reveal that the spin-wave spectra exhibit a strong dependence on both the angle of the applied magnetic field and the geometrical aspect ratio of the ferromagnetic layers. Micromagnetic simulations and analytical calculations, utilizing the Smit–Beljers formalism, demonstrate good agreement with our experimental findings. In the magnetic switching regime, the spin-wave spectra indicate an antiparallel alignment between the two ferromagnetic layers. This configuration is highly sensitive to the field angle, suggesting the presence of multidimensional reconfigurations within the multilayer artificial spin ice. Furthermore, employing a minor loop field protocol, we show that the spin-wave modes associated with the antiparallel alignment remain reproducible, even after 100 minor loop cycles, providing intriguing possibilities for magnonic engineering.

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多层方形人工自旋冰中多维重构型的磁振子特征

我们提出了一种全电、宽带自旋波光谱研究三维方形人工自旋冰，该自旋冰由偶极耦合的不同厚度的铁磁层组成，由非磁性间隔层隔开。我们的实验表明，在饱和状态下，自旋波谱对外加磁场的角度和铁磁层的几何纵横比都有很强的依赖性。利用Smit-Beljers形式的微磁模拟和分析计算与我们的实验结果很好地吻合。在磁开关状态下，自旋波谱显示两个铁磁层之间的反平行排列。这种构型对场角高度敏感，表明多层人工自旋冰内部存在多维重构型。此外，采用小环路场协议，我们表明与反平行排列相关的自旋波模式即使在100个小环路循环后仍然可以重现，为磁工程提供了有趣的可能性。

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.