Magnetic Interactions of the Centrosymmetric Skyrmion Material Gd2PdSi3

The experimental realization of magnetic skyrmion crystals in centrosymmetric materials has been driven by theoretical understanding of how a delicate balance of anisotropy and frustration can stabilize topological spin structures in applied magnetic fields. Recently, the centrosymmetric material Gd...

Full description

Saved in:
Bibliographic Details
Published in:Physical review letters 2022-09, Vol.129 (13)
Main Authors: Paddison, Joseph A. M., Rai, Binod K., May, Andrew F., Calder, Stuart A., Stone, Matthew B., Frontzek, Matthias D., Christianson, Andrew D.
Format: Article
Language:English
Subjects:
MATERIALS SCIENCE
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The experimental realization of magnetic skyrmion crystals in centrosymmetric materials has been driven by theoretical understanding of how a delicate balance of anisotropy and frustration can stabilize topological spin structures in applied magnetic fields. Recently, the centrosymmetric material Gd2PdSi3 was shown to host a field-induced skyrmion crystal, but the skyrmion stabilization mechanism remains unclear. Here, we employ neutron-scattering measurements on an isotopically enriched polycrystalline Gd2PdSi3 sample to quantify the interactions that drive skyrmion formation. Our analysis reveals spatially extended interactions in triangular planes, and large ferromagnetic interplanar magnetic interactions that are modulated by the Pd/Si superstructure. The skyrmion crystal emerges from a zero-field helical magnetic order with magnetic moments perpendicular to the magnetic propagation vector, indicating that the magnetic dipolar interaction plays a significant role. To conclude, our experimental results establish an interaction space that can promote skyrmion formation, facilitating identification and design of centrosymmetric skyrmion materials.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.129.137202