# Stray field signatures of N\'eel textured skyrmions in Ir/Fe/Co/Pt multilayer films

## TL;DR

This paper characterizes Ne9el skyrmions in multilayer films using multipole expansion modeling of MFM images, revealing their texture, size, and pinning forces, which advances understanding of their properties for spintronic applications.

## Contribution

It introduces a multipole expansion method to analyze stray field signatures of Ne9el skyrmions, enabling detailed characterization and insight into their dynamics.

## Key findings

- Confirmed Ne9el texture and size of skyrmions
- Demonstrated sensitivity to inhomogeneity in skyrmion properties
- Estimated pinning forces affecting skyrmion dynamics

## Abstract

Skyrmions are nanoscale spin configurations with topological properties that hold great promise for spintronic devices. Here, we establish their N\'eel texture, helicity, and size in Ir/Fe/Co/Pt multilayer films by constructing a multipole expansion to model their stray field signatures and applying it to magnetic force microscopy (MFM) images. Furthermore, the demonstrated sensitivity to inhomogeneity in skyrmion properties, coupled with a unique capability to estimate the pinning force governing dynamics, portends broad applicability in the burgeoning field of topological spin textures.