Stabilization of Skyrmions in a Nanodisk Without an External Magnetic Field

Authors

Hang Li
Collins Akosa
Peng Yan
Yuanxu Wang
Zhenxiang Cheng, University of WollongongFollow

RIS ID

142517

Publication Details

Li, H., Akosa, C. A., Yan, P., Wang, Y. & Cheng, Z. (2020). Stabilization of Skyrmions in a Nanodisk Without an External Magnetic Field. Physical Review Applied, 13 (3), 034046-1-034046-8.

Abstract

We study, in the absence of a magnetic field, the stability of skyrmions in a disk-shaped ferromagnetic multilayer in the presence of locally pinned spins at the edge. This particular boundary condition suppresses the formation of helical states yet enhances the stabilization of states with rotational symmetry, such as Neél skyrmions. Numerical simulation shows that the size of the disk is a viable parameter to control the creation and annihilation of skyrmionic states. We also find that the demagnetization field renormalizes the Dzyaloshinskii-Moriya interaction. This study opens an alternative avenue to the generation, stabilization, and control of magnetic skyrmions in field-free heterostructures.