Spectral linewidth of spin-current nano-oscillators driven by nonlocal spin injection
Spectral linewidth of spin-current nano-oscillators driven by nonlocal spin injection
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DOI：
10.1063/1.4936153
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发表时间：
2015-11-16
影响因子：
4
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.
实验研究了由非局部自旋注入产生的纯自旋电流驱动的磁性纳米振荡器的自振荡特性。通过将微焦布里渊光散射光谱与电子微波光谱相结合，我们能够同时对自旋电流引起的自振荡进行空间和高分辨率的光谱分析。我们发现器件在室温下表现出高度相干的动力学，谱线宽度为几兆赫兹。这种窄线宽可以在很宽的工作频率范围内实现，这表明非局部振荡器的应用潜力巨大。(C) 2015 AIP出版有限责任公司
We study experimentally the auto-oscillation characteristics of magnetic nano-oscillators driven by pure spin currents generated by nonlocal spin injection. By combining micro-focus Brillouin light scattering spectroscopy with electronic microwave spectroscopy, we are able to simultaneously perform both the spatial and the high-resolution spectral analyses of auto-oscillations induced by spin current. We find that the devices exhibit a highly coherent dynamics with the spectral line-width of a few megahertz at room temperature. This narrow linewidth can be achieved over a wide range of operational frequencies, demonstrating a significant potential of nonlocal oscillators for applications. (C) 2015 AIP Publishing LLC.