Current-driven dynamics of coupled domain walls in a synthetic antiferromagnet
Current-driven dynamics of coupled domain walls in a synthetic antiferromagnet
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DOI：
10.1103/physrevb.90.094411
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发表时间：
2014-07
影响因子：
3.7
通讯作者：
H. Saarikoski;H. Kohno;C. Marrows;G. Tatara
中科院分区：
文献类型：
--
作者：
H. Saarikoski;H. Kohno;C. Marrows;G. Tatara
我们发展了耦合双层系统中磁畴壁运动的理论，其中电子可以在层间跳跃，从而产生反铁磁耦合。我们表明，从层间耦合的力驱动的墙壁和非本征钉扎的效果大大降低，如果畴壁最初分离。亚稳态自旋取向配置的阈值电流密度也低得多。我们的结论是，层间耦合有一个显着的影响畴壁迁移率在双层系统。
We develop the theory of magnetic domain wall motion in coupled double-layer systems where electrons can hop between the layers giving rise to an antiferromagnetic coupling. We demonstrate that the force from the interlayer coupling drives the walls and the effect of the extrinsic pinning is greatly reduced if the domain walls are initially separated. The threshold current density for metastable spin-aligned configurations is also much lower. We conclude that the interlayer coupling has a significant effect on domain wall mobility in double-layer systems.