Observation of an Anomalous Hall Effect in Single-crystal Mn3Pt

• URL: http://arxiv.org/abs/2209.05865v2
• Date: Wed, 14 Sep 2022 08:51:51 GMT
• Title: Observation of an Anomalous Hall Effect in Single-crystal Mn3Pt
• Authors: Belen E. Zuniga-Cespedes, Kaustuv Manna, Hilary M. L. Noad, Po-Ya Yang, Michael Nicklas, Claudia Felser, Andrew P. Mackenzie, Clifford W. Hicks
• Abstract summary: A large anomalous Hall effect (AHE) was observed experimentally in one of the hexagonal members of the Mn3X family. Here, we demonstrate for the first time a substantial AHE in a bulk sample of a cubic member of the Mn3X family.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The Mn3X family of compounds was the first in which a large anomalous Hall effect (AHE) was predicted to arise from a purely antiferromagnetic structure, due to the Berry curvature in momentum space. Nearly simultaneously with this prediction, a large AHE was observed experimentally in one of the hexagonal members of this family, Mn3Sn. Aligning antiferromagnetic domains, a necessary step for observation of the AHE, is more challenging for the cubic members of the Mn3X family, due to a combination of a smaller spontaneous ferromagnetic moment and much stronger magnetic anisotropy. Here, we use a combination of uniaxial stress and applied magnetic field to align domains of bulk single-crystal Mn3Pt, and demonstrate for the first time a substantial AHE in a bulk sample of a cubic member of the Mn3X family. The AHE remains locked in with essentially no quantitative variation when the stress is ramped back to zero, which shows that it is not a consequence of any stress-induced ferromagnetic moment.

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