Tunable chiral spin texture in magnetic domain-walls.
Tunable chiral spin texture in magnetic domain-walls.
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DOI：
10.1038/srep05248
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发表时间：
2014-06-11
影响因子：
4.6
通讯作者：
Koopmans B
中科院分区：
文献类型：
--
作者：
Franken JH;Herps M;Swagten HJ;Koopmans B
具有优先手性的磁畴壁（DW）表现出非常有效的电流驱动运动。由于结构反转不对称性（SIA）是它们稳定所必需的，因此在高度对称的Pt/Co/Pt中观察手性畴壁是有趣的。在这里，我们调整层的不对称性在这个系统中，并观察到，通过电流辅助DW脱钉实验，一个小的手征场的敏感变化。此外，我们令人信服地链接到DW纹理的DW运动所观察到的效率，使用DW电阻作为直接探针的DW的内部取向的影响下的面内字段。覆盖层厚度对手征场的非常微妙的影响允许其精确控制，这对于设计用于最佳自旋轨道扭矩驱动DW运动的新型材料非常重要。
Magnetic domain-walls (DWs) with a preferred chirality exhibit very efficient current-driven motion. Since structural inversion asymmetry (SIA) is required for their stability, the observation of chiral domain walls in highly symmetric Pt/Co/Pt is intriguing. Here, we tune the layer asymmetry in this system and observe, by current-assisted DW depinning experiments, a small chiral field which sensitively changes. Moreover, we convincingly link the observed efficiency of DW motion to the DW texture, using DW resistance as a direct probe for the internal orientation of the DW under the influence of in-plane fields. The very delicate effect of capping layer thickness on the chiral field allows for its accurate control, which is important in designing novel materials for optimal spin-orbit-torque-driven DW motion.