Direct experimental measurement of phase-amplitude coupling in spin torque oscillators
Direct experimental measurement of phase-amplitude coupling in spin torque oscillators
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DOI：
10.1063/1.3467043
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发表时间：
2010-07-19
影响因子：
4
通讯作者：
Chappert, C.
中科院分区：
文献类型：
--
作者：
Bianchini, L.;Cornelissen, S.;Chappert, C.
我们在时域中研究了MgO磁性隧道结的自旋力矩诱导振荡。通过使用希尔伯特变换的时间轨迹，我们获得了第一次的功率和相位波动之间的耦合的直接实验测量。我们推导出的功率恢复率，我们得到的耦合强度，这是一致的弱频率依赖于所施加的电压低的值。(C)2010年美国物理学会。[doi：10.1063/1.3467043]
We study spin-torque induced oscillations of MgO magnetic tunnel junctions in the time domain. By using the Hilbert transform on the time traces, we obtain for the first time a direct experimental measure of the coupling between the power and the phase fluctuations. We deduce the power restoration rate and we obtain low values for the coupling strength, which is consistent with the weak frequency dependence on the applied voltage. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3467043]