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
影响因子:
4.6
通讯作者:
Demokritov SO
中科院分区:
文献类型:
--
作者:
Demidov VE;Urazhdin S;Zholud A;Sadovnikov AV;Slavin AN;Demokritov SO
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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