Direct imaging Berry curvature-induced transport and domain behavior in noncollinear single-crystal antiferromagnetic thin films.

Authors

Yuchuan Yao, Pratap Pal, Camron Farhang, Weihang Lu, Mohamed Elekhtiar, Paul Lenharth, Neil G Campbell, Gautam Gurung, Roger D Johnson, Pascal Manuel, Mark S Rzchowski, Evgeny Y Tsymbal, Jing Xia, Chang-Beom Eom

Published in

Science advances. Volume 12. Issue 35. Pages eaeb6478. Aug 28, 2026. Epub Aug 26, 2026.

Abstract

The discovery of the intrinsic anomalous Hall effect (AHE) in noncollinear antiferromagnets has opened a plethora of promising opportunities in antiferromagnetic devices. The key challenges limiting their full potential are (i) high-quality epitaxial thin-film growth and (ii) the understanding of Berry curvature and antiferromagnetic domain physics. Here, we focus on a noncollinear antiperovskite antiferromagnet Mn₃NiN as a model system, successfully grown as a single-crystal epitaxial thin film. Combining multiple experiments supported by theoretical calculations, we probe the Berry curvature associated with antiferromagnetic Γ_4g domains in Mn₃NiN and its strong connection to an AHE. We directly image the antiferromagnetic domains driving the intrinsic Berry curvature with high-resolution Sagnac MOKE (magneto-optical Kerr-effect) microscopy, controlling spatial distribution and dynamics by varying temperature and applied magnetic fields. Our findings provide critical advancement of the fundamental understanding and wide tunability of Berry curvature in noncollinear antiferromagnets important for realization in potential spintronic applications.

PMID:
42647614
Bibliographic data and abstract were imported from PubMed on 27 Aug 2026.

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