Abstract
We resolve the domain-wall structure of the model antiferromagnet using nanoscale scanning diamond magnetometry and second-harmonic-generation microscopy. We find that the domain walls are predominantly Bloch-like, and can coexist with Néel walls in crystals with significant in-plane anisotropy. In the latter case, Néel walls that run perpendicular to a magnetic easy axis acquire a well-defined chirality. We further report quantitative measurement of the domain-wall width and surface magnetization. Our results provide fundamental input and an experimental methodology for the understanding of domain walls in pure, intrinsic antiferromagnets, which is relevant to achieve electrical control of domain-wall motion in antiferromagnetic compounds.
- Received 28 August 2020
- Revised 28 December 2020
- Accepted 1 February 2021
DOI:https://doi.org/10.1103/PhysRevB.103.094426
©2021 American Physical Society
Physics Subject Headings (PhySH)
synopsis
Hidden Magnetic Structures Revealed
Published 17 March 2021
Researchers capture the previously hidden twists of spins in the domain wall of a “proper” antiferromagnetic material, chromium oxide.
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