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arXiv · 2302.13664

Strain-induced interlayer magnetic coupling spike of two-dimensional van der Waals material Fe$_5$GeTe$_2$

Wen-Qiang Xie·Chang-Chun He·Xiao-Bao Yang·Yu-Jun Zhao·Wen-Tong Geng
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Abstract

A stronger interlayer magnetic coupling (ILMC) can open up new opportunities in spintronics devices for Fe$_5$GeTe$_2$ (F5GT), a demonstrated two-dimensional (2D) van der Waals (vdW) material with high Currie temperature. Here we observe an extraordinary ILMC spike in F5GT, jumping from 1.15 to 12.79 meV/f.u, by applying a 3% in-plane strain. This spike is mainly ascribed to a significant increase in the magnetic moment of the Fe5 ion. Moreover, the applied in-plane strain can also significantly enhance the magnetic anisotropy energy (MAE) of the system, triggering the transition between the in/off-plane configurations in multi-layer F5GT.

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Wen-Qiang Xie, Chang-Chun He, Xiao-Bao Yang, Yu-Jun Zhao, Wen-Tong Geng. 2023-02-27. Strain-induced interlayer magnetic coupling spike of two-dimensional van der Waals material Fe$_5$GeTe$_2$. https://doi.org/10.1021/acs.jpcc.3c03788

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