The magnetization dynamics of two skyrmions with antiparallel vortex rotations on a nanowire substrate were investigated using micromagnetic simulations. When positioned in proximity, the skyrmions exhibit attractive interactions that decrease their separation distance. This interaction leads to a magnetic energy transition, resulting in the fusion of the two skyrmions into a single connected entity. Applying a static magnetic field aligned with the magnetization direction of the skyrmion cores causes this connected structure to expand, increasing the distance between their cores. Conversely, exposing the connected skyrmions to a specific alternating magnetic field induces resonant oscillations in the core-to-core distance, with the resonance frequency decreasing as the field amplitude increases. The effective mass of the connected skyrmions at resonance is calculated using the resonance frequency. Notably, excessively high amplitudes can cause these oscillations to converge the skyrmions excessively, leading to their annihilation. In simulations involving both static and alternating magnetic fields, separation of the connected skyrmions was not observed. These findings have potential implications for the advancement of technologies utilizing skyrmion numbers for innovative applications.

中文翻译：

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纳米线结构中的互连斯格明子：微磁模拟


使用微磁模拟研究了纳米线衬底上两个具有反平行涡旋旋转的斯格明子的磁化动力学。当靠近放置时，斯格明子会表现出吸引人的相互作用，从而缩短它们的分离距离。这种相互作用导致磁能转换，导致两个斯格明子融合成一个连接的实体。施加与斯格明子磁芯的磁化方向对齐的静电场会导致这种连接的结构膨胀，从而增加它们磁芯之间的距离。相反，将连接的斯格明子暴露在特定的交变磁场中会在磁芯到磁芯的距离内引起共振振荡，共振频率会随着磁场振幅的增加而降低。连接的斯格明子在谐振时的有效质量是使用谐振频率计算的。值得注意的是，过高的振幅会导致这些振荡过度收敛斯格明子，从而导致它们湮灭。在涉及静态和交变磁场的仿真中，没有观察到连接的斯格明子的分离。这些发现对利用斯格明子数进行创新应用的技术进步具有潜在意义。