电流垂直于平面的纳米收缩自旋阀中的自旋流涡旋
Spin-current vortices in current-perpendicular-to-plane nanoconstricted spin-valves
摘要：
采用有限元方法，在具有强非均匀电流的复杂非共线几何条件下，数值求解了考虑自旋翻转和自旋转移力矩的电荷和自旋扩散方程.作为示例，研究了通过分离两个磁性层的非磁性纳米收缩的自旋相关输运。获得了出乎意料的结果，例如在纳米收缩附近的自旋电流的涡旋。结构的几何形状强烈影响磁阻和自旋转移力矩的角度变化。
英文摘要：
The charge and spin diffusion equations taking into account spin-flip and spin-transfer torque were numerically solved using a finite element method in complex non-collinear geometry with strongly inhomogeneous current flow. As an illustration, spin-dependent transport through a non-magnetic nanoconstriction separating two magnetic layers was investigated. Unexpected results such as vortices of spin-currents in the vicinity of the nanoconstriction were obtained. The angular variations of magnetoresistance and spin-transfer torque are strongly influenced by the structure geometry.
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