MnSn monolayer synthesized recently is a novel two-dimensional ferromagnetic material with a hexagonal lattice, in which three Mn atom come together to form a trimer, making it remarkably different from other magnetic two-dimensional materials. Most impressively, there happens a sharp increase of Curie temperature from 54 K to 225 K when the number of layers increase from 1 to 3. However, no quantitative explanation is reported in previous studies. Herein, by means of first-principle calculations method and Monte carlo method, we demonstrate that strong interlayer ferromagnetic coupling is the essential role in enhancing its critical temperature, which act as a magnetic field to stabilize the ferromagnetism in the MnSn multilayers.
@article{arxiv.2203.17126,
title = {High-temperature ferromagnetism in two-dimensional material MnSn originated from interlayer coupling},
author = {Panjun Feng and Xiaohui Zhang and Dapeng Liu and Shuo Zhang and Xun-Wang Yan and Z. Y. Xie},
journal= {arXiv preprint arXiv:2203.17126},
year = {2024}
}