Signature of canted ferromagnetism in van der Waals Fe5−xGeTe2 flakes

IF 3.5 2区物理与天体物理 Q2 PHYSICS, APPLIED

Applied Physics Letters Pub Date : 2025-07-03 DOI:10.1063/5.0253974

Xiaocui Wang, Peiling Li, Yongkai Li, Xue Yang, Zhaozheng Lyu, Fanming Qu, Jie Shen, Xiunian Jing, Guangtong Liu, Li Lu, Junxi Duan, Zhiwei Wang

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引用次数: 0

Abstract

Van der Waals ferromagnetic materials, serving as an innovative platform for tailoring magnetic anisotropy and anisotropic magnetoresistance, offer great opportunities for designing and manipulating spintronic devices. In this study, we report the observation of temperature-dependent magnetic anisotropy and anisotropic magnetoresistance in high-quality single crystals of the van der Waals ferromagnet Fe5−xGeTe2. Due to the rhombohedral structure of Fe5GeTe2, the Fe atoms occupy three different sites, resulting in complex magnetic properties. As the electronic structure changes with decreasing temperature in Fe5−xGeTe2, the magnetic anisotropy is affected and results in a spin-flop transition from an out-of-plane orientation to a canted orientation. At low temperatures, the angle-dependent magnetoresistance shows a dramatic change, indicating anisotropic magnetoresistance in different crystallographic axis. The presence of room-temperature magnetism and giant anisotropic magnetoresistance suggests promising potential for Fe5−xGeTe2 in spintronic applications.

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范德华Fe5−xGeTe2薄片倾斜铁磁性特征

范德华铁磁材料作为一种裁剪磁各向异性和各向异性磁电阻的创新平台，为自旋电子器件的设计和操作提供了巨大的机会。在这项研究中，我们报道了在范德华铁磁体Fe5−xGeTe2的高质量单晶中观察到的与温度相关的磁各向异性和各向异性磁电阻。由于Fe5GeTe2的菱形结构，铁原子占据了三个不同的位置，导致了复杂的磁性能。Fe5−xGeTe2的电子结构随着温度的降低而变化，其磁各向异性受到影响，导致其从面外取向向倾斜取向发生自旋跳变。在低温下，角相关磁电阻表现出剧烈的变化，表明在不同的结晶轴上磁电阻呈各向异性。室温磁性和巨大各向异性磁电阻的存在表明Fe5−xGeTe2在自旋电子应用中有很大的潜力。

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.