We study the dynamic susceptibility of skyrmion clusters in Co/Pt nanodots using micromagnetic simulations. For this, we investigate the dynamic response of the skyrmions to a small magnetic field pulse applied parallel to the dot axis. Skyrmions exhibit a main resonance peak associated with the skyrmions' breathing mode, which is closely linked to the average radius of the skyrmions. Furthermore, we find that non-trivial secondary modes appear when the cluster size increases. These results can be used as a detection and characterization mechanism for skyrmion lattices in confined systems.

中文翻译：

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Co/Pt纳米点中skyrmion簇的动态磁化率

我们使用微磁模拟研究了 Co/Pt 纳米点中斯格明子簇的动态磁化率。为此，我们研究了斯格明子对平行于点轴施加的小磁场脉冲的动态响应。Skyrmions表现出与skyrmions的呼吸模式相关的主要共振峰，这与skyrmions的平均半径密切相关。此外，我们发现当集群大小增加时会出现非平凡的次要模式。这些结果可用作受限系统中斯格明子晶格的检测和表征机制。