Time required to injection-lock spin torque nanoscale oscillators
Time required to injection-lock spin torque nanoscale oscillators
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DOI：
10.1063/1.4821179
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发表时间：
2013-10-28
影响因子：
4
通讯作者：
Kos, Anthony
中科院分区：
文献类型：
--
作者：
Rippard, William;Pufall, Matthew;Kos, Anthony
我们已经注入锁定的自旋转移振荡器的二次谐波电输入信号和测量的相对相位和幅度的设备输出作为稳态条件下的直流电流的函数。该设备的相对相位随DC偏置准线性地变化，尽管平均幅度在频谱确定的锁定范围之外显著减小。通过脉冲注入的微波，测量装置锁相到注入信号所需的时间作为微波振幅的函数。锁定时间在研究的幅度范围内呈准线性变化，最短的锁定时间为几纳秒。
We have injection-locked a spin-transfer oscillator to a second-harmonic electrical input signal and measured the relative phase and amplitude of the device output as a function of DC current under steady-state conditions. The relative phase of the device varies quasi-linearly with DC bias, although the averaged amplitude decreases significantly outside of the spectrally determined locking range. By pulsing the injected microwaves, the time required for the device to phase-lock to the injected signal was measured as a function of microwave amplitude. The locking time varied quasi-linearly over the range of amplitudes studied, with the shortest locking times being a few nanoseconds.