Using magnetic force microscopy and micromagnetic simulations, we studied the effect of Oersted magnetic fields on the chirality of transverse magnetic domain walls in Fe$_{20}$Ni$_{80}$/Ir bilayer nanostrips. Applying nanosecond current pulses with a current density of around $2\times10^{12}$ A/m$^2$, the chirality of a transverse domain wall could be switched reversibly and reproducibly. These current densities are similar to the ones used for current-induced domain wall motion, indicating that the Oersted field may stabilize the transverse wall chirality during current pulses and prevent domain wall transformations.
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机译:使用磁力显微镜和微磁模拟,我们研究了Oersted磁场对Fe $ _ {20} $ Ni $ _ {80} $ / Ir双层纳米带中横向磁畴壁手性的影响。施加电流密度约为$ 2×10 ^ {12} A / m $ ^ 2 $的纳秒电流脉冲,横向畴壁的手性可以可逆和可重复地切换。这些电流密度与用于电流感应畴壁运动的电流密度相似,表明Oersted场可以在电流脉冲期间稳定横向壁手征,并防止畴壁变换。
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