Inverse spin-Hall effect voltage generation by nonlinear spin-wave excitation
Inverse spin-Hall effect voltage generation by nonlinear spin-wave excitation
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DOI：
10.1103/physrevb.93.064408
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发表时间：
2016-02-04
影响因子：
3.7
通讯作者：
Meier, Guido
中科院分区：
文献类型：
--
作者：
Feiler, Laura;Sentker, Kathrin;Meier, Guido
我们研究了通过高频磁场激发的微结构坡莫合金/铂双层中的自旋电流。由于这种激发，自旋泵浦发生在坡莫合金/铂界面处，并且自旋电流被注入到铂层中。通过逆自旋霍尔效应将自旋电流检测为电压。我们发现非线性、突然的电压浪涌反映了两种状态，这在不同的激励场强度下可重复观察到。微磁模拟表明，浪涌是由类自旋波模式的激发引起的。相对较大的电压揭示了介观自旋电子器件中高效的自旋电流产生方法。
We investigate spin currents in microstructured permalloy/platinum bilayers that are excited via magnetic high-frequency fields. Due to this excitation spin pumping occurs at the permalloy/platinum interface and a spin current is injected into the platinum layer. The spin current is detected as a voltage via the inverse spin-Hall effect. We find two regimes reflected by a nonlinear, abrupt voltage surge, which is reproducibly observed at distinct excitation field strengths. Micromagnetic simulations suggest that the surge is caused by excitation of a spin-wave-like mode. The comparatively large voltages reveal a highly efficient spin-current generation method in a mesoscopic spintronic device.