Abstract
The influence of cubic in-plane magnetic anisotropy on current-induced domain wall (DW) motion was investigated by micromagnetic simulation. DW velocity is enhanced when the nanostripes are placed in an optimized cubic in-plane magnetic anisotropy field that almost exactly compensates the demagnetizing field. An increase is also observed in the walker limit current, which is the linearity loss of the DW velocity as a function of spin current density when the latter exceeds a critical value. The microwave-assisted DW motion that is usually proposed to increase DW velocity is further improved by adding the cubic magnetic anisotropy field on the nanostripes. These effects of enhancing current-induced DW motion are useful for device applications.
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