Combined Magnetic Imaging and Anisotropic Magnetoresistance Detection of Dipolar Skyrmions

TL;DR

This study combines magnetic imaging and anisotropic magnetoresistance measurements to analyze dipolar skyrmions, revealing their properties and potential for improved electrical read-out in spintronic devices.

Contribution

It introduces a combined imaging and magnetoresistance approach to study dipolar skyrmions, providing new insights into their electrical detection mechanisms.

Findings

Anisotropic magnetoresistance is independent of skyrmion helicity.

Magnetoresistance is proportional to skyrmion count.

Single skyrmion and chain observed via Lorentz TEM.

Abstract

Magnetic skyrmions are localized particle-like nontrivial swirls that are promising in building high-performance topological spintronic devices. The read-out functions in skyrmionic devices require the translation of magnetic skyrmions to electrical signals. Here, we report combined real-space magnetic imaging and anisotropic magnetoresistance studies on dipolar skyrmions. A single skyrmion chain and single skyrmion are observed using Lorentz transmission electron microscopy imaging. Meanwhile, the field, helicity, and skyrmion count dependence of anisotropic magnetoresistance of the Fe3Sn2 nanostructures are obtained simultaneously. Our results demonstrate that the anisotropic magnetoresistance of skyrmions is independent of the helicity and proportional to the skyrmion count. Our work could promote read-out operations in skyrmion-based spintronic devices.