Magnetostatics of magnetic skyrmion crystals

Ren Qin,Yong Wang

doi:10.1088/1367-2630/aac9b1

Abstract

Magnetic skyrmion crystals are topological magnetic textures arising in the chiral ferromagnetic materials with Dzyaloshinskii–Moriya interaction. The magnetostatic fields generated by magnetic skyrmion crystals are first studied by micromagnetic simulations. For Néel-type skyrmion crystals, the fields will vanish on one side of the crystal plane, which depend on the helicity; while for Bloch-type skyrmion crystals, the fields will distribute over both sides, and are identical for the two helicities. These features and the symmetry relations of the magetostatic fields are understood from the magnetic scalar potential and magnetic vector potential of the hybridized triple-Q state. The possibility to construct magnetostatic field at nanoscale by stacking chiral ferromagnetic layers with magnetic skyrmion crystals is also discussed, which may have potential applications to trap and manipulate neutral atoms with magnetic moments.

Highlights

Magnetic skyrmion crystals are topological magnetic textures arising in the chiral ferromagnetic materials with Dzyaloshinskii-Moriya interaction
Magnetic skyrmions are particle-like topological defects in the magnetization configuration, and their swirling structures are characterized by topological skyrmion numbers[9]
In this Letter, we will investigate the magnetostatic fields generated by magnetic skyrmion crystals (SkXs) with different helicities, and show the possibility to construct the field distributions at nanoscale through stacking the chiral ferromagnet films for further applications

Summary

Introduction

Magnetic skyrmion crystals are topological magnetic textures arising in the chiral ferromagnetic materials with Dzyaloshinskii-Moriya interaction. In this Letter, we will investigate the magnetostatic fields generated by magnetic skyrmion crystals (SkXs) with different helicities, and show the possibility to construct the field distributions at nanoscale through stacking the chiral ferromagnet films for further applications.

Results

Conclusion