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arXiv · 2205.00300

Piezoelectric ferromagnetism in two dimensional FeCl$_2$

Kayahan Saritas·Sohrab Ismail-Beigi
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Abstract

We predict that monolayer FeCl$_2$ is a two-dimensional piezoelectric ferromagnet (PFM) with easy-axis magnetism and a Curie temperature of 260 K. Our ab-initio calculations combined with data mining reveal 2H-FeCl$_2$ as the only easy-axis 2D monolayer PFM, and that its magnetic anisotropy increases many-fold with moderate hole doping. We develop an analysis based on magnetic anisotropy energy densities that explain the magnetic and doping-dependent behavior of FeCl$_2$, as well as VSe$_2$ and CrI$_3$, and can enable the design of future 2D magnetically ordered materials.

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Kayahan Saritas, Sohrab Ismail-Beigi. 2022-04-30. Piezoelectric ferromagnetism in two dimensional FeCl$_2$. https://arxiv.org/abs/2205.00300

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