Stabilization and helicity control of hybrid magnetic skyrmion

TL;DR

This paper explores the stabilization and helicity control of hybrid magnetic skyrmions in 2D systems, revealing how Dzyaloshinskii-Moriya interactions and dipolar forces influence their properties, with implications for quantum computing.

Contribution

It provides an analytical and simulation-based study on how to stabilize and control the helicity of hybrid skyrmions through Dzyaloshinskii-Moriya interactions and dipolar effects.

Findings

Hybrid skyrmions can be stabilized by interplay of interfacial DM and bulk DM or dipolar interactions.

Helicity can be tuned by adjusting the ratio of interfacial to bulk DM interactions.

Hybrid skyrmions are feasible in Co-based systems within specific DM interaction ranges.

Abstract

The hybrid skyrmion, a type of magnetic skyrmion with intermediate helicity between Bloch and N\'eel skyrmion, has gained more attraction. It is tolerant toward the skyrmion Hall effect and a potential candidate for quantum bits. We investigated the stabilization and helicity control of the hybrid skyrmion in a two-dimensional magnetic system using an analytical model and micromagnetic simulation. We look at the interplaying factors of the bulk ($D_b$) and interfacial ($D_i$) Dzyaloshinskii-Moriya (DM) interactions along with the dipolar interaction. We show that the hybrid skyrmion can stabilize through the interplay between interfacial DM and either bulk DM or dipolar interaction. We can also control the helicity of the hybrid skyrmion by tuning the ratio of $D_i/D_b$ when there is no dipolar interaction, or simply by adjusting the $D_i$ when the $D_b$ is absent. Our results suggest that hybrid skyrmions can exist within $0 < |D_i| < 0.4$ mJ/m$^2$ for Co-based magnetic systems.