The anomalous Hall effect in non-collinear antiferromagnetic MnNiN thin films
arXiv:1902.04357 · doi:10.1103/PhysRevMaterials.3.094409
Abstract
We have studied the anomalous Hall effect (AHE) in strained thin films of the frustrated antiferromagnet MnNiN. The AHE does not follow the conventional relationships with magnetization or longitudinal conductivity and is enhanced relative to that expected from the magnetization in the antiferromagnetic state below \,K. This enhancement is consistent with origins from the non-collinear antiferromagnetic structure, as the latter is closely related to that found in MnIr and MnPt where a large AHE is induced by the Berry curvature. As the Berry phase induced AHE should scale with spin-orbit coupling, yet larger AHE may be found in other members of the chemically flexible MnN structure.
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