Dynamics of Antiferromagnets Driven by Spin Current

Abstract

When a spin-polarized current flows through a ferromagnetic (FM) metal, angular momentum is transferred to the background magnetization via spin-transfer torques. In antiferromagnetic (AFM) materials, however, the corresponding problem is unsolved. We derive microscopically the dynamics of an AFM system driven by spin current generated by an attached FM polarizer, and find that the spin current exerts a driving force on the local staggered order parameter. The mechanism does not rely on the conservation of spin angular momentum, nor does it depend on the induced FM moments on top the AFM background. Two examples are studied: (i) A domain wall is accelerated to a terminal velocity by purely adiabatic effect where the Walker's break-down is avoided; and (ii) Spin injection modifies the AFM resonance frequency, and spin current injection triggers spin wave instability of local moments above a threshold.

5 pages (superlink for supplemental material is provided)

References in corpus (10)

• Spin Transfer Torques
• Phenomenology of Current-Induced Dynamics in Antiferromagnets
• Staggered Dynamics in Antiferromagnets by Collective Coordinates
• Spin transfer in an antiferromagnet
• Theory of current-driven magnetization dynamics in inhomogeneous ferromagnets
• Spin-transfer torques in anti-ferromagnetic metals from first principles
• Effect of Polarized Current on the Magnetic State of Antiferromagnet
• Symmetry and the macroscopic dynamics of antiferromagnetic materials in the presence of spin-polarized current
• Electron Dynamics in Slowly Varying Antiferromagnetic Texture
• Theory of spin magnetohydrodynamics

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