Rotating magnetic fields driven antiferromagnetic domain wall motions.

In this work, we study the rotating magnetic fields driven domain wall motions in antiferromagnetic nanowires, using the numerical simulations of the classical Heisenberg spin model. We show that in low frequency region, the rotating field alone could efficiently drive the DW motion even in the absence of Dzyaloshinskii-Moriya interaction. In this case, the DW rotates synchronously with the magnetic field, and a stable precession torque is available and drives the DW motion with a steady velocity. In large frequency region, the DW only oscillates around its equilibrium position and cannot propagate. The dependences of the velocity and critical frequency differentiating the two motion modes on several parameters are investigated in details, which definitely provides useful information for future antiferromagnetic spintronics applications.