Non-equilibrium domain wall dynamics on a perpendicularly magnetized nanowire manipulated by the transverse magnetic field pulse are numerically investigated. We systematically observe the large displacements of the chiral domain wall and the domain wall tilting angles generated by Dzyaloshinskii-Moriya interaction during the competition between the precession torque and the magnetic damping process. The magnetic-property-dependent domain wall displacements exhibit that the lower magnetic damping constants and Dzyaloshinskii-Moriya energy densities generate the longer transition times and the significant larger domain wall displacements for the non-equilibrium magnetization dynamics. Compare with the spin-polarized-current-driven domain wall dynamics, the transverse magnetic field pulses guarantee faster domain wall movements without Walker breakdown and lower energy consumptions because it is free from the serious Joule heating issue. Finally, we demonstrate successive chiral domain wall displacements, which are necessary to develop multilevel resistive memristors for next-generation artificial intelligent devices based on magnetic domain wall motions.

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横向磁场脉冲激发的非平衡手征畴壁动力学

数值研究了由横向磁场脉冲操纵的垂直磁化纳米线上的非平衡畴壁动力学。我们系统地观察了旋进扭矩和磁阻尼过程之间的竞争过程中由 Dzyaloshinskii-Moriya 相互作用产生的手性畴壁的大位移和畴壁倾斜角。与磁特性相关的畴壁位移表明，较低的磁阻尼常数和 Dzyaloshinskii-Moriya 能量密度会为非平衡磁化动力学产生更长的过渡时间和显着更大的畴壁位移。与自旋极化电流驱动的畴壁动力学相比，横向磁场脉冲可确保更快的畴壁移动而不会出现沃克击穿并降低能耗，因为它没有严重的焦耳热问题。最后，我们展示了连续的手征畴壁位移，这是为基于磁畴壁运动的下一代人工智能设备开发多级电阻忆阻器所必需的。