论文标题
非线性旋转振荡器的多发频谱生成非线性扭矩振荡器
Generation of Multipeak Spectrum of Spin Torque Oscillator in Non-linear Regime
论文作者
论文摘要
我们研究了自旋霍尔诱导的自旋电流激发的自旋扭矩振荡器（STO）的光谱特性。我们观察到，适度的自旋电流注入会触发STO的常规单峰振荡行为。随着旋转电流进一步增加以进入非线性状态，我们发现频谱从单个峰到多峰结构的过渡，其频率间距是恒定的。这种行为可以主要用STO的极宽的峰来解释，STO的峰伴随着传输线的频率过滤。为了更定量地解释该观察结果，我们还讨论了多言论可能反映了非线性制度中Sto固有动力学的特征。
We investigate the spectral characteristics of spin torque oscillator (STO) excited by the spin Hall-induced spin current. We observe that the modest spin current injection triggers the conventional single peak oscillating behavior of STO. As the spin current is further increased to enter the non-linear regime, we find the transition of the spectrum from a single peak to multipeak structure whose frequency spacing is constant. This behavior can be primarily explained by the extremely broadened peak of the STO, which is accompanied by the frequency-dependent filtering by the transmission line. To explain the observation more quantitatively, we also discuss that the multipeak may reflect the characteristics of the intrinsic dynamics of STO in the non-linear regime.
