垂直自旋极化自旋电流脉冲驱动下Mn2Au的反铁磁动力学

IF 3.6 2区物理与天体物理 Q2 PHYSICS, APPLIED

Applied Physics Letters Pub Date : 2025-06-03 DOI:10.1063/5.0266902

Mo Zhu, Milad Jalali, Zongzhi Zhang, Richard F. L. Evans, Jackson L. Ross, Roy W. Chantrell, Yaowen Liu

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引用次数: 0

摘要

反铁磁体有望实现磁序的超快相干切换。本研究利用原子水平的动态模拟研究了电流脉冲下Mn2Au的超快自旋动力学，并考虑了极化自旋电流在Mn层上的衰减效应。稳定、相干的自旋进动在临界电流密度以上实现，太赫兹频率与电流强度成线性比例。此外，受电流密度和脉冲持续时间的影响，在1ps内的90°或180°n扮成矢量开关，证明了精确控制自旋动力学的可能性。这些结果为反铁磁自旋电子结构的超快动力学提供了原子水平的见解。

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Antiferromagnetic dynamics of Mn2Au driven by spin current pulses with perpendicular spin polarization

Antiferromagnets hold promise for ultrafast coherent switching of magnetic order. This study uses atomistic-level dynamic simulations to investigate the ultrafast spin dynamics of Mn2Au under current pulses, incorporating the effects of polarized spin-current attenuation across Mn layers. Stable, coherent spin precession is achieved above a critical current density, with terahertz frequencies that scale linearly with current strength. Additionally, 90° or 180° Néel vector switching within 1 ps, influenced by current density and pulse duration, demonstrates the possibility of precise control of spin dynamics. These results offer atomic-level insight into ultrafast dynamics in antiferromagnetic spintronic structures.

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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.