Cross effect of magnetic field and charge current on antiferromagnetic dynamics

Abstract

We theoretically examine a cross effect of magnetic field and charge current on antiferromagnetic domain wall dynamics. Since antiferromagnetic materials are largely insensitive to external magnetic fields in general, charge current has been shown recently as an alternative and efficient way to manipulate antiferromagnets. We find a new role of the magnetic field in the antiferromagnetic dynamics that appears when it is combined with charge current, demonstrating a domain wall motion in the presence of both field and current. We show that a spatially-varying magnetic field can shift the current-driven domain-wall velocity, depending on the domain-wall structure and the direction of the field-gradient. Our result suggests a novel concept of field-control of current-driven antiferromagnetic dynamics.

5 pages, 3 figures

References in corpus (10)

• Spin pumping and spin-transfer torques in antiferromagnets
• Phenomenology of Current-Induced Dynamics in Antiferromagnets
• Staggered Dynamics in Antiferromagnets by Collective Coordinates
• Spin transfer in an antiferromagnet
• Spin-transfer torques in anti-ferromagnetic metals from first principles
• Effect of Polarized Current on the Magnetic State of Antiferromagnet
• Ultrafast Switching of Antiferromagnets via Spin-transfer Torque
• Ab-initio GMR and current-induced torques in Au/Cr multilayers
• Spin Transfer Torque in Antiferromagnetic Spin-Valves: From Clean to Disordered Regimes
• Inelastic scattering in ferromagnetic and antiferromagnetic metal spintronics

Cited by in corpus (5)

• Dynamics of noncollinear antiferromagnetic textures driven by spin current injection
• Zeeman term for the Néel vector in a two sublattice antiferromagnet using Dzyaloshinsky-Moriya interaction and magnetic field
• Magnetic field control of antiferromagnetic domain walls in a thermal gradient
• Dynamics of domain walls in curved antiferromagnetic wires
• Controllable dispersion of domain wall movement in antiferromagnetic thin films at finite temperatures