Antiferromagnetic Domain Wall Motion Driven by Spin-Orbit Torques
Antiferromagnetic Domain Wall Motion Driven by Spin-Orbit Torques
We theoretically investigate the dynamics of antiferromagnetic domain walls driven by spin-orbit torques in antiferromagnet--heavy-metal bilayers. We show that spin-orbit torques drive antiferromagnetic domain walls much faster than ferromagnetic domain walls. As the domain wall velocity approaches the maximum spin-wave group velocity, the domain wall undergoes Lorentz contraction and emits …