A general model of MnSi-like spiral magnets

TL;DR

This paper introduces a comprehensive model for MnSi-like spiral magnets, exploring their phase behavior, microscopic structure, and skyrmion stabilization through numerical simulations aligned with theoretical predictions.

Contribution

It presents a symmetry-allowed, general model capturing the phase diagram and microscopic features of MnSi-like magnets, including skyrmion stabilization.

Findings

Left-handed helical phase exists over a large parameter space.

Model parameters correlate well with free energy predictions.

Skyrmion structures are stabilized near phase boundaries.

Abstract

A general, symmetry-allowed model of nearest-neighbour interactions for MnSi-like magnets is presented. A left-handed helical magnet phase occurs within a large parameter space of the model, which is explored via numerical simulation. The relations between microscopic features of the spiral structure and various model parameters, including an external magnetic field, are determined and show good agreement with predictions from free energy considerations. A skyrmion structure is stabilized near the boundary.