Current-induced switching of antiferromagnetic order in Mn2 Au from first principles

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2022
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Salemi, Leandro
Deák, András
Simon, Eszter
Szunyogh, László
Oppeneer, Peter M.
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Physical Review B. American Physical Society (APS). 2022, 105(17), 174416. ISSN 2469-9950. eISSN 2469-9969. Available under: doi: 10.1103/PhysRevB.105.174416
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It is well established that it is possible to switch certain antiferromagnets electrically, yet the interplay of Néel-spin-orbit torques and thermal activation is only poorly understood. Combining ab initio calculations and atomistic spin dynamics simulations we develop a multiscale model to study the current-induced switching in Mn2Au. We compute from first principles the strength and direction of the electrically induced magnetic moments, caused by the Rashba-Edelstein effect, and take these into account in atomistic spin dynamics simulations. Our simulations reveal the switching paths as well as the timescales for switching. The size of the induced moments, however, turns out to be insufficient to lead to fully deterministic switching. Instead, we find that a certain degree of thermal activation is required to help overcome the relevant energy barrier.

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ISO 690SELZER, Severin, Leandro SALEMI, András DEÁK, Eszter SIMON, László SZUNYOGH, Peter M. OPPENEER, Ulrich NOWAK, 2022. Current-induced switching of antiferromagnetic order in Mn2 Au from first principles. In: Physical Review B. American Physical Society (APS). 2022, 105(17), 174416. ISSN 2469-9950. eISSN 2469-9969. Available under: doi: 10.1103/PhysRevB.105.174416
BibTex
@article{Selzer2022Curre-57624,
  year={2022},
  doi={10.1103/PhysRevB.105.174416},
  title={Current-induced switching of antiferromagnetic order in Mn<sub>2</sub> Au from first principles},
  number={17},
  volume={105},
  issn={2469-9950},
  journal={Physical Review B},
  author={Selzer, Severin and Salemi, Leandro and Deák, András and Simon, Eszter and Szunyogh, László and Oppeneer, Peter M. and Nowak, Ulrich},
  note={Article Number: 174416}
}
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