Abstract
Magnetic domain wall (DW) creep motions driven by a magnetic field and by the spin Hall (SH) torque are investigated in perpendicularly magnetized Co/Ni nanowires with structural inversion asymmetry. It is found that the DW arrival time distribution becomes wider when a DW is driven by the SH torque compared with that driven by a magnetic field. Our results indicate that the SH torque and a magnetic field drive a DW in different ways in the DW creep regime, although the SH torque is generally considered to induce an effective field.
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