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

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.

25 pages, 9 figures

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Cited by in corpus (1)

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