Nearly isotropic magnon transport in epitaxial lithium aluminum ferrite thin films

IF 3.8 2区物理与天体物理 Q2 PHYSICS, APPLIED

Applied Physics Letters Pub Date : 2026-10-05 DOI:10.1063/5.0341020

Yiming Li,Katya Mikhailova,Lerato Takana,Daisy O'Mahoney,Sauviz P. Alaei,Guanxiong Qu,Dominic Petruzzi,Samuel Crossley,Harold Y. Hwang,Ian R. Fisher,Clare C. Yu,Yuri Suzuki

引用次数: 0

Abstract

Low-loss magnetic insulating thin films are promising for information transport via magnons, where isotropic in-plane magnon propagation is desirable. We report nonlocal measurements of electrically and thermally generated magnons in epitaxial (001) lithium aluminum ferrite Li0.5Al0.7Fe1.8O4 thin films with pronounced fourfold in-plane magnetic anisotropy. By measuring the inverse spin Hall signal as a function of the magnon diffusion distance, we deduce magnon diffusion lengths that are nearly identical along the [100] and [110] directions at 250 K. This isotropy is consistent with a nearly isotropic exchange stiffness. These results highlight spinel ferrites as viable platforms for isotropic magnon transport.

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外延锂铝铁氧体薄膜的近各向同性磁振子输运

低损耗磁绝缘薄膜有望通过磁振子传输信息，其中各向同性磁振子在平面内传播是可取的。我们报道了外延（001）锂铝铁氧体Li0.5Al0.7Fe1.8O4薄膜中电和热产生的磁振子的非局部测量结果，该薄膜具有明显的四倍平面内磁各向异性。通过测量逆自旋霍尔信号作为磁振子扩散距离的函数，我们推断出在250 K时沿[100]和[110]方向的磁振子扩散长度几乎相同。这种各向同性与几乎各向同性的交换刚度是一致的。这些结果强调尖晶石铁氧体是各向同性磁振子输运的可行平台。

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.