In this study, we investigated the micromagnetic dynamics of kπ-state skyrmions in a magnetic nanodot under a circular spin-polarized current and found an excited spin wave that can propagate persistently along the direction of the radius toward the center. This dynamic process is associated with two energetically favorable states in an oscillating period of spin waves. In this case, the spin-polarized current plays a role similar to effective perpendicular magnetic anisotropy and decreases the minimum energy in the magnetic system. Our findings provide insight into understanding the dynamic behaviors of topological magnetic textures.

中文翻译：

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kπ态天体的自旋波的持久激发

在这项研究中，我们调查k的微磁动力学π -state skyrmions在磁性纳米点下的圆形自旋极化电流，发现激发自旋波可沿朝向中心的半径的方向上持续地传播。该动态过程在自旋波的振荡周期中与两个在能量上有利的状态相关联。在这种情况下，自旋极化电流起着类似于有效垂直磁各向异性的作用，并降低了磁系统中的最小能量。我们的发现为理解拓扑磁性纹理的动态行为提供了见识。