Current-Induced Domain Wall Motion in Perpendicular Magnetized Tb–Fe–Co Wire with Different Interface Structures
Current-Induced Domain Wall Motion in Perpendicular Magnetized Tb–Fe–Co Wire with Different Interface Structures
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DOI：
10.1143/apex.5.125201
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发表时间：
2012-11
影响因子：
2.3
通讯作者：
Do Bang;H. Awano
中科院分区：
文献类型：
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作者：
Do Bang;H. Awano
研究了垂直磁各向异性SiO_2/TbFeCo/Pt（非对称界面）和Pt/TbFeCo/Pt（对称界面）丝中的电流感生畴壁运动。发现在室温下，非对称界面线中畴壁的移动方向与电子流方向相反，而对称界面线中畴壁的移动方向与电子流方向相同。TbFeCo/Pt界面处的Rashba场和Pt层注入的自旋霍尔电流是异质材料夹持的双磁性薄膜中畴壁反向运动的可能性。
Current-induced domain wall motion has been investigated in perpendicular magnetic anisotropy SiO2/TbFeCo/Pt (asymmetric interface) and Pt/TbFeCo/Pt (symmetric interface) wires. The domain wall is found to be moved in opposite to the electron-flow direction in the asymmetric interface wire whereas it is kept same direction in the symmetric one at room temperature. As an alternative to the conventional spin-transfer torque, the Rashba field at the TbFeCo/Pt interface and the spin Hall current injected from the Pt layer are possibilities of the reversed domain wall motion in an ultrathin magnetic film sandwiched by dissimilar materials.