Parametric excitation of magnetization oscillations controlled by pure spin current
Parametric excitation of magnetization oscillations controlled by pure spin current
复制标题
DOI：
10.1103/physrevb.86.134420
复制
发表时间：
2012-10-22
影响因子：
3.7
通讯作者：
Urazhdin, S.
中科院分区：
文献类型：
--
作者：
Edwards, E. R. J.;Ulrichs, H.;Urazhdin, S.
我们报道了纯自旋电流存在下坡莫合金微盘中磁化振荡的参数激发的实验研究。后者是由相邻的Pt层由于自旋霍尔效应而产生的。我们证明了由纯自旋电流引起的自旋力矩可以显著降低参量不稳定性的阈值，并在给定的泵浦功率下改变参量激发振荡的频率范围。我们的研究结果表明，纯自旋电流可以用来刺激和控制微观结构中的非线性动态磁现象。
We report an experimental investigation of parametric excitation of magnetization oscillations in a permalloy microdisk in the presence of a pure spin current. The latter is generated by an adjacent Pt layer due to the spin Hall effect. We demonstrate that the spin torque induced by the pure spin current can significantly reduce the threshold for parametric instability, and modify the frequency range of the parametrically excited oscillation at a given pumping power. Our results show that pure spin currents can be utilized for stimulation and control of nonlinear dynamic magnetic phenomena in microscopic structures.