Micromagnetic study of excitation modes of an artificial skyrmion crystal

Micromagnetic study of excitation modes of an artificial skyrmion crystal
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人造斯格明子晶体激发模式的微磁研究

DOI:
10.1063/1.4936756
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发表时间:
2015-11-30
影响因子:
4
通讯作者:
Ding, H. F.
Ding, H. F.
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Miao, B. F.;Wen, Y.;Ding, H. F.

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我们提出了一个人工skyrmion晶体,这已被实验证实是稳定的,在室温下,不需要任何Dzyaloshinsky-Moriya相互作用(Dzyaloshinsky-Moriya相互作用)的本征激发的微磁学研究。三个平面内旋转模式和一个呼吸型模式被识别。我们发现Skyrmion晶体动力学的内在起源是非平凡的磁织构,而不是磁性织构。而Skyrmion的旋转方向仅由Skyrmion数的符号决定,而与其环流方向无关,证明了磁Skyrmion的拓扑性质。
We present a micromagnetic study on the eigen excitations of an artificial skyrmion crystal, which has been experimentally confirmed to be stable at room temperature without the need of any Dzyaloshinsky-Moriya interaction (DMI). Three in-plane rotational modes and one breathing-type mode are identified. We find the intrinsic origin of the dynamics of skyrmion crystal is the nontrivial magnetic texture instead of DMI. And the rotational direction of a skyrmion is solely determined by the sign of the skyrmion number, irrespective of its circulation sense, evidencing the topological nature of the magnetic skyrmion.