论文标题
dzyaloshinskii-moriya相互作用对径向自旋波驱动的磁涡流开关的影响
Effect of Dzyaloshinskii-Moriya interaction on magnetic vortex switching driven by radial spin waves
论文作者
论文摘要
理论上，在存在dzyaloshinskii-moriya相互作用（DMI）的情况下，我们从理论上研究了径向自旋诱导的磁涡流切换。从微磁模拟中，我们通过增加DMI强度观察到圆形到radial涡流相变。分析了每种磁化配置的径向自旋波激发光谱，表明带有给定径向节点数的自旋波模式单调增加（减小）随径向（圆形）涡流的DMI参数。有趣的是，我们发现DMI可以显着促进由径向自旋波驱动的圆形涡流的极性切换。我们的工作为DMI对涡旋动力学的影响提供了新的见解，并有助于设计快速的全磁性内存设备。
We theoretically investigate the radial-spin-wave induced magnetic vortex switching in the presence of Dzyaloshinskii-Moriya interaction (DMI). From micromagnetic simulations, we observe a circular-to-radial vortex phase transition by increasing the DMI strength. The radial spin-wave excitation spectrum for each magnetization configuration is analyzed, showing that the frequency of spin-wave mode with a given radial node number monotonically increases (decreases) with the DMI parameter of the radial (circular) vortex. Interestingly, we find that the DMI can significantly facilitate the polarity switching of the circular vortex driven by radial spin waves. Our work provides a new insight into the DMI effect on the vortex dynamics and is helpful for designing fast all-magnonic memory devices.
