Magnetic two-dimensional materials have potential application in next-generation electronic devices and have stimulated extensive interest in condensed matter physics and material fields. However, how to realize high-temperature ferromagnetism in two-dimensional materials remains a great challenge in physics. Herein, we propose an effective approach that the dimerization of magnetic ions in two-dimensional materials can enhance the exchange coupling and stabilize the ferromagnetism. Manganese carbonitride Mn2N6C6 with a planar monolayer structure is taken as an example to clarify the method, in which two Mn atoms are gathered together to form a ferromagnetic dimer of Mn atoms and further these dimers are coupled together to form the overall ferromagnetism of the two-dimensional material. In Mn2N6C6 monolayer, the near-room-temperature ferromagnetism with the Curie temperature of 272.3 K is determined by solving Heisenberg model using Monte Carlo simulations method.
@article{arxiv.2203.01775,
title = {Achieving high-temperature ferromagnetism by means of magnetic ions dimerization},
author = {Panjun Feng and Shuo Zhang and Dapeng Liu and Miao Gao and Fengjie Ma and Xun-Wang Yan and Z. Y. Xie},
journal= {arXiv preprint arXiv:2203.01775},
year = {2024}
}
Comments
Journal of Physical Chemistry C Cite This: https://doi.org/10.1021/acs.jpcc.2c02593