To enhance thermal stability while keeping low driven current is difficult in traditional domain wall (DW) motion devices. The increasing of energy barrier for thermal stability inevitably results in the enhancement of driven current. We numerically investigate depinning field (H _depin) and critical current density (J _c) for DW motion as a function of uniaxial magnetic anisotropy (K _u) in vertical DW motion memory with artificial ferromagnet. It is found that H _depin and J _c show different K _u dependence. The results indicate that it is promising to simultaneously achieve high thermal stability and low driven current in artificial ferromagnet based DW motion devices.

在传统的畴壁 (DW) 运动设备中，很难在保持低驱动电流的同时增强热稳定性。热稳定性能垒的增加不可避免地导致驱动电流的增加。我们数值研究了 DW 运动的去钉_扎场 ( H _depin ) 和临界电流密度 ( J _c ) 作为具有人造铁磁体的垂直 DW 运动记忆中单轴磁各向异性 ( K _u )的函数。发现H _depin和J _c显示不同的K _u依赖性。结果表明，在基于人造铁磁体的 DW 运动装置中同时实现高热稳定性和低驱动电流是有希望的。