Current-Induced Domain-Wall Motion in [CoFe/Pt]$_{5}$ Nanowire With Perpendicular Magnetic Anisotropy

摘要

We experimentally demonstrate the current-induced domain wall motion in [CoFe/Pt]$_{5}$ nanowire with perpendicular magnetic anisotropy. By use of the scanning MOKE measurement, we observe that two domain walls are moved simultaneously by spin polarized current at the current density of $1.43 times 10^{12}$ A/m $^{2}$. The domain wall speed is estimated to be about 1.5 m/s, determined by the domain wall displacement (750 nm) and the current pulse duration (500 ns). From in situ resistance measurement, the temperature of the nanowire rises up to 700 K when the domain wall moves at such the high current density.