Spin Hall torque magnetometry of Dzyaloshinskii domain walls
Spin Hall torque magnetometry of Dzyaloshinskii domain walls
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DOI：
10.1103/physrevb.90.184427
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发表时间：
2014-11-25
影响因子：
3.7
通讯作者：
Beach, Geoffrey S. D.
中科院分区：
文献类型：
--
作者：
Emori, Satoru;Martinez, Eduardo;Beach, Geoffrey S. D.
实验和理论研究了重金属/铁磁体双层膜中存在Dzyaloshinskiii-Moriya相互作用时的电流诱导畴壁运动。的电流引起的扭矩和Dzyaloshinskii域壁的磁化结构的角度依赖性的描述和量化同时在面内场的存在下。我们表明，的抗弯强度强烈依赖于重金属，Ta和Pa之间的变化的20倍，和强大的抗弯导致在传统材料中看不到的壁变形。这些发现提供了必要的见解，了解和利用新兴的自旋电子学应用的手征磁性。
Current-induced domain wall motion in the presence of the Dzyaloshinskii-Moriya interaction (DMI) is experimentally and theoretically investigated in heavy-metal/ferromagnet bilayers. The angular dependence of the current-induced torque and the magnetization structure of Dzyaloshinskii domain walls are described and quantified simultaneously in the presence of in-plane fields. We show that the DMI strength depends strongly on the heavy metal, varying by a factor of 20 between Ta and Pa, and that strong DMI leads to wall distortions not seen in conventional materials. These findings provide essential insights for understanding and exploiting chiral magnetism for emerging spintronics applications.