A theory on skyrmion size

A magnetic skyrmion is a topological object consisting of a skyrmion core, an outer domain, and a wall that separates the skyrmion core from the outer domain. The skyrmion size and wall width are two fundamental quantities of a skyrmion that depend sensitively on material parameters such as exchange...

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Bibliographic Details
Published inCommunications physics Vol. 1; no. 1
Main Authors Wang, X. S., Yuan, H. Y., Wang, X. R.
Format Journal Article
LanguageEnglish
Published London Nature Publishing Group UK 04.07.2018
Nature Publishing Group
Subjects
639/766/119/1001
639/766/119/997
Data processing
Data storage
Domain walls
Domains
Hypothetical particles
Magnetic anisotropy
Parameter sensitivity
Particle theory
Physics
Physics and Astronomy
Topology
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Summary:A magnetic skyrmion is a topological object consisting of a skyrmion core, an outer domain, and a wall that separates the skyrmion core from the outer domain. The skyrmion size and wall width are two fundamental quantities of a skyrmion that depend sensitively on material parameters such as exchange energy, magnetic anisotropy, Dzyaloshinskii–Moriya interaction, and magnetic field. However, quantitative understanding of the two quantities is still very poor. Here we present a general theory on skyrmion size and wall width. The two formulas we obtained agree almost perfectly with simulations and experiments for a wide range of parameters, including most of the existing materials that support skyrmions. Skyrmions are magnetic topological features which are expected to play an important role in future data storage and information processing devices. The authors outline a theoretical method to calculate the size and wall width of an isolated skyrmion.
ISSN:2399-3650
2399-3650
DOI:10.1038/s42005-018-0029-0