Temperature-dependent magnetic properties of the antiferromagnet Mn2Au
Abstract
Mn2Au is one of the most promising materials for antiferromagnetic spintronics due to its high Néel temperature, moderate anisotropy, layered spin structure allowing current induced spin-orbit-torques, and ultrafast spin dynamics. Further understanding and control of the magnetic order in Mn2Au for ultrafast spintronics applications via ultrashort electric/optical means requires accurate understanding of how its magnetic properties depend on temperature. Here we present atomistic spin dynamics simulations of the temperature-dependent macroscopic magnetic properties of Mn2Au single crystals. We introduce a spin Hamiltonian based on previous ab initio calculations which produces temperature-dependent scaling of the anisotropy constants with magnetisation consistent with Zener-Akulov-Callen-Callen power laws. The calculated temperature dependence of exchange stiffness follows a scaling law with magnetisation of m1.83e , and predicts a temperature-dependent domain wall width that agrees very well with direct simulation. Our model provides an understanding of temperature-dependent magnetic properties of Mn2Au that enables large-scale simulation of the working conditions of spintronic devices.
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BibTeX
@misc{ross2026temperaturedependent,
title = {{Temperature-dependent magnetic properties of the antiferromagnet Mn$_2$Au}},
author = {Jackson L. Ross and Sarah Jenkins and Ricardo Rama-Eiroa and Paul-Iulian Gavriloaea and Jack Collins and Unai Atxitia and Oksana Chubykalo-Fesenko and Karin Everschor-Sitte and Rubén M. Otxoa and Roy W. Chantrell and Richard F. L. Evans},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.35153},
eprint = {2610.35153},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.35153},
note = {CC BY-NC-ND 4.0},
}
RIS
TY - UNPB
TI - Temperature-dependent magnetic properties of the antiferromagnet Mn_2Au
AU - Jackson L. Ross
AU - Sarah Jenkins
AU - Ricardo Rama-Eiroa
AU - Paul-Iulian Gavriloaea
AU - Jack Collins
AU - Unai Atxitia
AU - Oksana Chubykalo-Fesenko
AU - Karin Everschor-Sitte
AU - Rubén M. Otxoa
AU - Roy W. Chantrell
AU - Richard F. L. Evans
PY - 2026
DA - 2026/10/28
PB - arXiv
DO - 10.48550/arxiv.2610.35153
UR - https://arxiv.org/abs/2610.35153
AB - Mn_2Au is one of the most promising materials for antiferromagnetic spintronics due to its high Néel temperature, moderate anisotropy, layered spin structure allowing current induced spin-orbit-torques, and ultrafast spin dynamics. Further understanding and control of the magnetic order in Mn_2Au for ultrafast spintronics applications via ultrashort electric/optical means requires accurate understanding of how its magnetic properties depend on temperature. Here we present atomistic spin dynamics simulations of the temperature-dependent macroscopic magnetic properties of Mn_2Au single crystals. We introduce a spin Hamiltonian based on previous ab initio calculations which produces temperature-dependent scaling of the anisotropy constants with magnetisation consistent with Zener-Akulov-Callen-Callen power laws. The calculated temperature dependence of exchange stiffness follows a scaling law with magnetisation of m^1.83_e , and predicts a temperature-dependent domain wall width that agrees very well with direct simulation. Our model provides an understanding of temperature-dependent magnetic properties of Mn_2Au that enables large-scale simulation of the working conditions of spintronic devices.
ER -