Abstract

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.

Details

Title
A theory on skyrmion size
Author
Wang, X S 1 ; Yuan, H Y 2 ; Wang, X R 3 

 University of Electronic Science and Technology of China, School of Electronic Science and Engineering and State Key Laboratory of Electronic Thin Film and Integrated Devices, Chengdu, China (GRID:grid.54549.39) (ISNI:0000 0004 0369 4060); The Hong Kong University of Science and Technology, Physics Department, Kowloon, Hong Kong (GRID:grid.24515.37) (ISNI:0000 0004 1937 1450) 
 Southern University of Science and Technology, Department of Physics, Shenzhen, China (GRID:grid.24515.37) 
 University of Electronic Science and Technology of China, School of Electronic Science and Engineering and State Key Laboratory of Electronic Thin Film and Integrated Devices, Chengdu, China (GRID:grid.54549.39) (ISNI:0000 0004 0369 4060); HKUST Shenzhen Research Institute, Shenzhen, China (GRID:grid.495521.e) 
Publication year
2018
Publication date
2018
Publisher
Nature Publishing Group
e-ISSN
23993650
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2389692144
Copyright
© The Author(s) 2018. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.