Breathing modes of skyrmion strings in a synthetic antiferromagnet multilayer
Breathing modes of skyrmion strings in a synthetic antiferromagnet multilayer
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DOI：
10.1063/5.0142772
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发表时间：
2021-12
影响因子：
3.2
通讯作者：
Christopher E. A. Barker;E. Haltz;T. Moore;C. Marrows
中科院分区：
文献类型：
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作者：
Christopher E. A. Barker;E. Haltz;T. Moore;C. Marrows
Skyrmions是一种小型的拓扑保护的磁性结构，在从数据存储到神经形态计算的应用中有着广阔的前景，而且它们已经被证明具有内部微波频率激励。合成反铁磁体中的Skyrmions已经被预测比它们的铁磁等效体更小、更快，并且也被证明拥有更多的内模。在这项工作中，我们用微磁模拟的方法研究了四次合成的反铁磁多层膜中Skyrmions的呼吸模，并考察了这些模进一步分裂成不同排列的异相、同相和具有更复杂相关系的模。这导致了频率的降低，这对于合成反铁磁体中的天米子传感应用是很有希望的。
Skyrmions are small topologically protected magnetic structures that hold promise for applications from data storage to neuromorphic computing and they have been shown to possess internal microwave frequency excitations. Skyrmions in a synthetic antiferromagnet have been predicted to be smaller and faster than their ferromagnetic equivalents and also shown to possess more internal modes. In this work, we consider the breathing modes of skyrmions in a four repetition synthetic antiferromagnetic multilayer by means of micromagnetic simulations and examine the further splitting of the modes into different arrangements of out-of-phase, in-phase, and modes with more complex phase relationships. This results in a lowering of frequencies, which is promising for skyrmion sensing applications in a synthetic antiferromagnet.