Control of Magnetic Fluctuations by Spin Current
Control of Magnetic Fluctuations by Spin Current
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DOI：
10.1103/physrevlett.107.107204
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发表时间：
2011-09-02
影响因子：
8.6
通讯作者：
Demokritov, S. O.
中科院分区：
文献类型：
--
作者：
Demidov, V. E.;Urazhdin, S.;Demokritov, S. O.
我们使用微焦点布里渊光散射光谱来研究自旋电流与位于携带电流的铂带顶部的坡莫合金微盘中磁波动的相互作用。我们表明，电流的不同方向可以有效地抑制或增强波动。此外，我们发现自旋电流对磁涨落的影响受到非线性磁振子-磁振子相互作用的强烈影响。观察到的现象可用于自旋电子纳米器件中可控地降低热噪声。
We use microfocus Brillouin light scattering spectroscopy to study the interaction of spin current with magnetic fluctuations in a Permalloy microdisk located on top of a Pt strip carrying an electric current. We show that the fluctuations can be efficiently suppressed or enhanced by different directions of the electric current. Additionally, we find that the effect of spin current on magnetic fluctuations is strongly influenced by nonlinear magnon-magnon interactions. The observed phenomena can be used for controllable reduction of thermal noise in spintronic nanodevices.