论文标题
电流驱动的磁化动力学及其与垂直磁化隧道连接中磁化配置的相关性
Current-driven magnetization dynamics and their correlation with magnetization configurations in perpendicularly magnetized tunnel junctions
论文作者
论文摘要
我们研究了垂直磁隧道连接（MTJ）纳米氏菌的自旋转移旋转驱动的磁化动力学。基于自旋扭转铁磁共振和微波光谱技术的组合，我们证明了自由层（FL）和弱固定参考层（RL）表现出不同的动态行为，具有相反的频率与场分散关系。 FL可以为平行和反平行配置支持单个相干自旋波（SW）模式，而RL仅对反平行状态显示自旋波激发。这两种与FL和RL在反平行状态下共存的SW模式，并随着外部磁场的增加而表现出振荡频率的交叉现象，这可能有助于基于SW的基于SW的神经形态计算的自动振荡的相互同步。
We study spin-transfer-torque driven magnetization dynamics of a perpendicular magnetic tunnel junction (MTJ) nanopillar. Based on the combination of spin-torque ferromagnetic resonance and microwave spectroscopy techniques, we demonstrate that the free layer (FL) and the weak pinned reference layer (RL) exhibit distinct dynamic behaviors with opposite frequency vs. field dispersion relations. The FL can support a single coherent spin-wave (SW) mode for both parallel and antiparallel configurations, while the RL exhibits spin-wave excitation only for the antiparallel state. These two SW modes corresponding to the FL and RL coexist at an antiparallel state and exhibit a crossover phenomenon of oscillation frequency with increasing the external magnetic field, which could be helpful in the mutual synchronization of auto-oscillations for SW-based neuromorphic computing.
