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Strain-induced interlayer magnetic coupling spike of two-dimensional van der Waals material Fe₅GeTe₂

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arxiv 2302.13664 v1 pith:ZBYY3QB2 submitted 2023-02-27 cond-mat.mtrl-sci cond-mat.other

Strain-induced interlayer magnetic coupling spike of two-dimensional van der Waals material Fe₅GeTe₂

Wen-Qiang Xie , Chang-Chun He , Xiao-Bao Yang , Yu-Jun Zhao , Wen-Tong Geng This is my paper
classification cond-mat.mtrl-sci cond-mat.other
keywords magneticf5gtspikecouplinggeteilmcin-planeinterlayer
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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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