Mutual synchronization of nano-oscillators driven by pure spin current
Mutual synchronization of nano-oscillators driven by pure spin current
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DOI：
10.1063/1.4964884
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发表时间：
2016-09
影响因子：
4
通讯作者：
S. Urazhdin;V. Demidov;R. Cao;B. Divinskiy;V. Tyberkevych;A. Slavin;A. Rinkevich;S. Demokritov
中科院分区：
文献类型：
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作者：
S. Urazhdin;V. Demidov;R. Cao;B. Divinskiy;V. Tyberkevych;A. Slavin;A. Rinkevich;S. Demokritov
我们报道了由非局域自旋注入产生的纯自旋电流驱动的磁性纳米振荡器相互同步的实验观测。我们发现，由于自旋电流激发的动力学模的直接空间重叠，振荡器有效地同步，这是由于这些器件固有的大的自振区域促进了这一点。同步发生在驱动电流的间隔内，该间隔由促进同步的动态非线性和由抑制同步的自旋电流增强的短波长磁波动之间的竞争确定。所证明的同步效应可以用来控制由自旋流引起的动力学状态的空间和光谱特性。
We report the experimental observation of mutual synchronization of magnetic nano-oscillators driven by pure spin current generated by nonlocal spin injection. We show that the oscillators efficiently synchronize due to the direct spatial overlap of the dynamical modes excited by the spin current, which is facilitated by the large size of the auto-oscillation area inherent to these devices. The synchronization occurs within an interval of the driving current determined by the competition between the dynamic nonlinearity that facilitates synchronization and the short-wavelength magnetic fluctuations enhanced by the spin current that suppress synchronization. The demonstrated synchronization effects can be utilized to control the spatial and spectral characteristics of the dynamical states induced by the spin currents.