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Micromagnetic study of excitation modes of an artificial skyrmion crystal
- Source :
- Applied Physics Letters. 107:222402
- Publication Year :
- 2015
- Publisher :
- AIP Publishing, 2015.
-
Abstract
- 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.
Details
- ISSN :
- 10773118 and 00036951
- Volume :
- 107
- Database :
- OpenAIRE
- Journal :
- Applied Physics Letters
- Accession number :
- edsair.doi...........49b6c112edb7e7993e9beb8f0492c446
- Full Text :
- https://doi.org/10.1063/1.4936756