Spin-current nano-oscillator based on nonlocal spin injection.

Spin-current nano-oscillator based on nonlocal spin injection.
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DOI:
10.1038/srep08578
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发表时间:
2015-02-26
期刊:
影响因子:
4.6
通讯作者:
Demokritov SO
Demokritov SO
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Demidov VE;Urazhdin S;Zholud A;Sadovnikov AV;Slavin AN;Demokritov SO

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非局域自旋注入已被认为是产生与电荷转移无关的纯自旋电流的有效机制。在这里,我们通过实验证明它可以诱导相干磁化动力学,这可用于实现自旋电子和磁波应用的新型微波纳米源。我们表明,此类源表现出较小的振荡线宽,并且可以通过静磁场在很宽的频率范围内进行调谐。动态磁化强度的空间分辨测量表明振荡区域相对较大,从而导致振荡相对于热波动具有较高的稳定性。我们提出了一个简单的拟线性动力学模型,可以很好地再现振荡特性。
Nonlocal spin injection has been recognized as an efficient mechanism for creation of pure spin currents not tied to the electrical charge transfer. Here we demonstrate experimentally that it can induce coherent magnetization dynamics, which can be utilized for the implementation of novel microwave nano-sources for spintronic and magnonic applications. We show that such sources exhibit a small oscillation linewidth and are tunable over a wide frequency range by the static magnetic field. Spatially resolved measurements of the dynamical magnetization indicate a relatively large oscillation area, resulting in a high stability of the oscillation with respect to thermal fluctuations. We propose a simple quasilinear dynamical model that reproduces well the oscillation characteristics.
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发表时间: 1999-08-30
影响因子: 8.6
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