Micromagnetic study of excitation modes of an artificial skyrmion crystal
Micromagnetic study of excitation modes of an artificial skyrmion crystal
复制标题
人造斯格明子晶体激发模式的微磁研究
DOI:
10.1063/1.4936756
复制
发表时间:
2015-11-30
影响因子:
4
通讯作者:
Ding, H. F.
中科院分区:
文献类型:
--
作者:
Miao, B. F.;Wen, Y.;Ding, H. F.
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.