基于涡旋的自旋转移振荡器对微波电流的锁相
Phase locking of vortex based spin transfer oscillators to a microwave current
摘要：
对涡旋自旋转移振荡器在外加微波电流作用下的锁相实验进行了研究。我们提出了明确的证据，相位锁定，频率牵引，以及在这个系统中的分数同步，在锁定状态下的最小峰值线宽只有3 kHz。我们发现，锁定范围的1/3的振荡器频率的顺序是很容易实现的，因为在我们的涡流为基础的系统中观察到的大的可调谐性$\partial f/\partial I_{dc}$。如此大的锁定范围使我们能够证明与外部源串联连接的两个独立振荡器的同步锁相。
英文摘要：
Phase locking experiments on vortex based spin transfer oscillators with an external microwave current are performed. We present clear evidence of phase locking, frequency pulling, as well as fractional synchronization in this system, with a minimum peak linewidth of only 3 kHz in the locked state. We find that locking ranges of the order of 1/3 of the oscillator frequency are easily achievable because of the large tunability $\partial f/\partial I_{dc}$ observed in our vortex based systems. Such large locking ranges allow us to demonstrate the simultaneous phase locking of two independent oscillators connected in series with the external source.
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