Phenomenology of Current-Induced Dynamics in Antiferromagnets

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.

Final version accepted by Physical Review Letters

References in corpus (8)

• Spin Transfer Torques
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• Electron Transport Driven by Nonequilibrium Magnetic Textures
• Theory of current-driven magnetization dynamics in inhomogeneous ferromagnets
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Cited by in corpus (6)

• Staggered Dynamics in Antiferromagnets by Collective Coordinates
• Spin Seebeck effect in antiferromagnets and compensated ferrimagnets
• Ultrafast Switching of Antiferromagnets via Spin-transfer Torque
• Berry-phase effects and electronic dynamics in noncollinear antiferromagnetic texture
• Current effect on magnetization oscillations in a ferromagnet - antiferromagnet junction
• Theory of spin motive force in one-dimentional antiferromagnetic domain wall