范德华铁磁/反铁磁异质结构中的自旋受挫和非常规表面自旋倾斜态

IF 26.8 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Advanced Materials Pub Date : 2025-08-01 DOI:10.1002/adma.202504700

Tianye Wang, Qian Li, Mengmeng Yang, Yu Sun, Alpha T. N'Diaye, Christoph Klewe, Andreas Scholl, Xianzhe Chen, Xiaoxi Huang, Hongrui Zhang, Santai Yang, Ji‐Eun Lee, Dhanvanth Balakrishnan, Xixiang Zhang, Chanyong Hwang, Padraic C. Shafer, Michael F. Crommie, Ramamoorthy Ramesh, Zi Q. Qiu

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引用次数: 0

摘要

范德华（vdW）材料的原子平面为解决一个长期存在的基本问题铺平了道路，即补偿反铁磁（AFM）表面如何在FM/AFM异质结构中阻碍铁磁（FM）覆盖层。我们通过分别表征AFM和FM自旋来研究Fe5GeTe2/NiPS3 vdW异质结构。我们发现平面内之字形AFM NiPS3形成了三个等效的AFM结构域，它们对外部磁场和与Fe5GeTe2的磁耦合都很强健。此外，在Fe5GeTe2/NiPS3中，Fe5GeTe2的自旋在空间上从靠近界面的面外方向转向远离界面的面内方向，形成了一种非常规的面外表面自旋倾斜状态。平面外表面自旋倾斜是vdW磁异质结构中自旋受挫的一种独特性质。

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Spin Frustration and Unconventional Surface Spin Canting State in Van der Waals Ferromagnet/Antiferromagnet Heterostructures

Atomically flat surfaces of van der Waals (vdW) materials pave an avenue for addressing a long‐standing fundamental issue of how a compensated antiferromagnet (AFM) surface frustrates a ferromagnetic (FM) overlayer in FM/AFM heterostructures. We investigate Fe5GeTe2/NiPS3 vdW heterostructures by characterizing AFM and FM spins separately. We find that in‐plane zig‐zag AFM NiPS3 develops three equivalent AFM domains, which are robust against external magnetic field and magnetic coupling with Fe5GeTe2. Moreover, evidence is provided of in‐plane‐AFM‐induced perpendicular magnetic anisotropy (PMA) in adjacent Fe5GeTe2, and an unconventional out‐of‐plane surface spin canting state with the Fe5GeTe2 spins spatially turn from out‐of‐plane direction near the interface to in‐plane direction away from the interface in Fe5GeTe2/NiPS3. The out‐of‐plane surface spin canting is a unique property of spin frustration in vdW magnetic heterostructures.

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来源期刊

Advanced Materials 工程技术-材料科学：综合

CiteScore

43.00

自引率

4.10%

发文量

2182

审稿时长

2 months

期刊介绍： Advanced Materials, one of the world's most prestigious journals and the foundation of the Advanced portfolio, is the home of choice for best-in-class materials science for more than 30 years. Following this fast-growing and interdisciplinary field, we are considering and publishing the most important discoveries on any and all materials from materials scientists, chemists, physicists, engineers as well as health and life scientists and bringing you the latest results and trends in modern materials-related research every week.