Nonvolatile multistate magnetoresistance in all-van der Waals antiferromagnet-based spin valves

IF 3.6 2区物理与天体物理 Q2 PHYSICS, APPLIED

Applied Physics Letters Pub Date : 2025-04-15 DOI:10.1063/5.0253237

Wen Jin, Gaojie Zhang, Hao Wu, Li Yang, Bichen Xiao, Jie Yu, Wenfeng Zhang, Haixin Chang

引用次数: 0

Abstract

Antiferromagnets are gaining increasing significance in spintronics due to their advantageous properties, such as picosecond spin dynamics and negligible stray fields. However, their practical application is hindered by the challenges associated with electrical detection methods. Here, we report the observation of multistate magnetoresistance (MR) in all-van der Waals antiferromagnet-based heterojunctions. By employing an A-type antiferromagnet (Fe0.8Co0.2)3GaTe2 (FCGaT) as the magnetic electrode, we fabricate spin valve devices based on the FCGaT/WSe2/FCGaT heterojunction. The nonvolatile MR arises from changes in the conductance of the heterojunction due to the magnetic phase transitions of the FCGaT layers. Our findings expand the potential applications of antiferromagnets in spintronics and pave the way for the development of next-generation memory devices with high density and ultrafast operation.

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全范德华反铁磁自旋阀的非易失多态磁阻

反铁磁体由于具有皮秒自旋动力学和可忽略杂散场等优点，在自旋电子学中具有越来越重要的意义。然而，它们的实际应用受到与电检测方法相关的挑战的阻碍。本文报道了在全范德华反铁磁异质结中观察到的多态磁阻（MR）。采用a型反铁磁体（Fe0.8Co0.2）3GaTe2 （FCGaT）作为磁电极，制备了基于FCGaT/WSe2/FCGaT异质结的自旋阀器件。非易失性磁流变是由FCGaT层的磁相变引起的异质结电导的变化引起的。我们的发现扩大了反铁磁体在自旋电子学中的潜在应用，并为开发具有高密度和超快操作的下一代存储器件铺平了道路。

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.