Drastic change of magnetic anisotropy in Fe3GeTe2 and Fe4GeTe2 monolayers under electric field studied by density functional theory

Magnetic anisotropy energy (MAE) is one of the most important properties in two-dimensional magnetism since the magnetization in two dimension is vulnerable to the spin rotational fluctuations. Using density functional theory calculation, we show that perpendicular electric field dramatically enhanc...

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Bibliographic Details
Published in:Scientific reports 2021-09, Vol.11 (1), p.17567-17567, Article 17567
Main Authors: Kim, Dongwook, Lee, Changhoon, Jang, Bo Gyu, Kim, Kyoo, Shim, Ji Hoon
Format: Article
Language:English
Subjects:
639/301/1034/1038
639/766/119/2793
Anisotropy
Electric fields
Humanities and Social Sciences
Magnetism
multidisciplinary
Science
Science (multidisciplinary)
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Summary:Magnetic anisotropy energy (MAE) is one of the most important properties in two-dimensional magnetism since the magnetization in two dimension is vulnerable to the spin rotational fluctuations. Using density functional theory calculation, we show that perpendicular electric field dramatically enhances the in-plane and out-of-plane magnetic anisotropies in Fe 3 GeTe 2 and Fe 4 GeTe 2 monolayers, respectively, allowing the change of easy axis in both systems. The changes of the MAE under the electric field are understood as the result of charge redistribution inside the layer, which is available due to the three-dimensional (3D) network of Fe atoms in the monolayers. As a result, we suggest that due to the unique structure of Fe n GeTe 2 compounds composed by peculiar 3D networks of metal atoms, the MAE can be dramatically changed by the external perpendicular electric field.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-021-96639-3