空穴缺陷如何改变铁磁纳米盘中的涡旋动力学
How hole defects modify vortex dynamics in ferromagnetic nanodisks
摘要：
在铁磁纳米盘中引入的缺陷可能会深刻影响稳定的类涡旋磁化的结构和动力学。在这里，分析技术用于研究，在其他动力学方面，如何一个小的圆柱形腔修改的振荡模式的旋涡。例如，我们已经认识到，如果旋涡从孔中成核出来，它的旋向性频率就会移到下面。当涡核部分或完全被孔捕获时，修改变得更加明显。在这些情况下，回转矢量可以被部分或完全抑制，从而使相关的频率显著增加，比如说，从几倍增加到几次幂。我们的研究结果可能的相关性，了解其他方面的涡动力学中存在的空腔和/或结构缺陷进行了讨论。
英文摘要：
Defects introduced in ferromagnetic nanodisks may deeply affect the structure and dynamics of stable vortex-like magnetization. Here, analytical techniques are used for studying, among other dynamical aspects, how a small cylindrical cavity modify the oscillatory modes of the vortex. For instance, we have realized that if the vortex is nucleated out from the hole its gyrotropic frequencies are shifted below. Modifications become even more pronounced when the vortex core is partially or completely captured by the hole. In these cases, the gyrovector can be partially or completely suppressed, so that the associated frequencies increase considerably, say, from some times to several powers. Possible relevance of our results for understanding other aspects of vortex dynamics in the presence of cavities and/or structural defects are also discussed.
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