Abstract
By micromagnetic simulation, we investigated the effect of the Dzyaloshinskii-Moriya interaction (DMI) on the static and dynamic characteristics of a 360 degrees domain wall. Simulation results show that both the energy and the size of a 360 degrees domain wall decrease with the increase of DMI intensity. In the presence of DMI, the stable motion of a 360 degrees domain wall can be either along the +x direction or -x direction depending on the sign of the DMI. For stable motion, the maximum velocity of a 360 degrees domain wall is 19.87% larger than that without the DMI. Increasing the current density beyond the Walker threshold, conversion between the 360 degrees domain wall state and the vortex state was observed. Further increasing the current density, the proliferation of 360 degrees domain walls becomes possible. Moreover, the 360 degrees domain wall becomes more flexible and easier to pass a notch by considering the DMI. These findings may offer guidance for the development of 360 degrees domain wall-based racetrack memories.