Pure spin current-induced domain wall motion probed by localized spin signal detection
Pure spin current-induced domain wall motion probed by localized spin signal detection
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DOI：
10.1103/physrevb.88.214405
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发表时间：
2013-12
影响因子：
3.7
通讯作者：
Nils Motzko;Björn Burkhardt;Nils Richter;R. Reeve;P. Laczkowski;W. S. Torres;L. Vila;J. Attané;M. Kläui
中科院分区：
文献类型：
--
作者：
Nils Motzko;Björn Burkhardt;Nils Richter;R. Reeve;P. Laczkowski;W. S. Torres;L. Vila;J. Attané;M. Kläui
我们通过非局域自旋阀几何结构中的纯扩散自旋流演示了畴壁的位移，无需任何外部施加场。我们通过使用自旋电流导管两侧的接触同时进行非局部自旋信号测量来实现对畴壁位置的局部检测，这使得我们甚至能够确定自旋电流导管下方的畴壁位置。使用这种检测方法，我们在扫描场或电流应用时探测磁畴壁在自旋电流导管上移动时的位置。在非局域结构中注入纯自旋电流，我们发现在优化的几何结构中，我们可以在有效自旋电流 A/m 下移动横向头对头或尾对尾畴壁，而无需任何外部施加场，这表明该方法可以成为低功耗畴壁操纵的可行途径。
We demonstrate the displacement of domain walls via pure diffusive spin currents in a nonlocal spin valve geometry, without any externally applied fields. We implement a localized detection of the domain wall position by simultaneous nonlocal spin signal measurements using contacts on both sides of the spin current conduit, which allows us to determine the domain wall position even underneath the spin current conduit. Using this detection method, we probe the domain wall position as it moves across the spin current conduit when sweeping a field or on current application. Injecting pure spin currents in the nonlocal architecture, we find that in our optimized geometry we can displace a transverse head-to-head or tail-to-tail domain wall without any externally applied fields at effective spin currentsA/m, showing that this method can be a viable avenue to low-power domain wall manipulation.