Phenomenology of Current-Induced Dynamics in Antiferromagnets
Mesoscale and Nanoscale Physics
2011-03-11 v2 Materials Science
Other Condensed Matter
Abstract
We derive a phenomenological theory of current-induced staggered magnetization dynamics in antiferromagnets. The theory captures the reactive and dissipative current-induced torques and the conventional effects of magnetic fields and damping. A Walker ansatz describes the dc current-induced domain-wall motion when there is no dissipation. If magnetic damping and dissipative torques are included, the Walker ansatz remains robust when the domain-wall moves slowly. As in ferromagnets, the domain-wall velocity is proportional to the ratio between the dissipative-torque and the magnetization damping. In addition, a current-driven antiferromagnetic domain-wall acquires a net magnetic moment.
Keywords
Cite
@article{arxiv.1012.5655,
title = {Phenomenology of Current-Induced Dynamics in Antiferromagnets},
author = {Kjetil M. D. Hals and Yaroslav Tserkovnyak and Arne Brataas},
journal= {arXiv preprint arXiv:1012.5655},
year = {2011}
}
Comments
Final version accepted by Physical Review Letters