Observation of an anomalous Hall effect in single-crystal Mn3Pt

Belén E Zuniga-Cespedes; Kaustuv Manna; Hilary M L Noad; Po-ya Yang; Michael Nicklas; Claudia Felser; Andrew P Mackenzie; Clifford W Hicks

doi:10.1088/1367-2630/acbc3f

Observation of an anomalous Hall effect in single-crystal Mn₃Pt

Belén E Zuniga-Cespedes, Kaustuv Manna, Hilary M L Noad, Po-ya Yang, Michael Nicklas, Claudia Felser, Andrew P Mackenzie, Clifford W Hicks^*

^*Corresponding author for this work

Physics and Astronomy

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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 smaller spontaneous ferromagnetic moments 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.

Original language	English
Article number	023029
Number of pages	10
Journal	New Journal of Physics
Volume	25
Issue number	2
DOIs	https://doi.org/10.1088/1367-2630/acbc3f
Publication status	Published - 24 Feb 2023

Bibliographical note

Acknowledgments
We thank Peter Milde, Yan Sun, and Binghai Yan for useful discussions. We thank in addition Tomoya Higo and Satoru Nakatsuji for critical readings of our manuscript, and Hua Chen for assistance with the piezomagnetic tensor. We also thank Renate Hempel-Weber and Ulrike Ließ for technical assistance. We acknowledge the financial support of the Max Planck Society. BZ, CF, APM, and CWH acknowledge in addition financial support from the Deutsche Forschungsgemeinschaft through SFB 1143 (Project ID 247310070). KM and CF acknowledge financial support from the European Research Council (ERC), Advanced Grant No. 742068 'TOPMAT'; European Union's Horizon 2020 research and innovation program (Grant Nos. 824123 and 766566). Additionally, KM acknowledges funding support from Max Planck Society under Max Planck-India partner group project and the Board of Research in Nuclear Sciences (58/20/03/2021- BRNS, DAE-YSRA), Department of Atomic Energy (DAE), Government of India. H M L N acknowledges support from the Alexander von Humboldt Foundation through a Research Fellowship for Postdoctoral Researchers. Research in Dresden benefits from the environment provided by the DFG Cluster of Excellence ct.qmat (EXC 2147, project ID 390858940).

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Cite this

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title = "Observation of an anomalous Hall effect in single-crystal Mn3Pt",

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 smaller spontaneous ferromagnetic moments 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.",

author = "Zuniga-Cespedes, {Bel{\'e}n E} and Kaustuv Manna and Noad, {Hilary M L} and Po-ya Yang and Michael Nicklas and Claudia Felser and Mackenzie, {Andrew P} and Hicks, {Clifford W}",

note = "Acknowledgments We thank Peter Milde, Yan Sun, and Binghai Yan for useful discussions. We thank in addition Tomoya Higo and Satoru Nakatsuji for critical readings of our manuscript, and Hua Chen for assistance with the piezomagnetic tensor. We also thank Renate Hempel-Weber and Ulrike Lie{\ss} for technical assistance. We acknowledge the financial support of the Max Planck Society. BZ, CF, APM, and CWH acknowledge in addition financial support from the Deutsche Forschungsgemeinschaft through SFB 1143 (Project ID 247310070). KM and CF acknowledge financial support from the European Research Council (ERC), Advanced Grant No. 742068 'TOPMAT'; European Union's Horizon 2020 research and innovation program (Grant Nos. 824123 and 766566). Additionally, KM acknowledges funding support from Max Planck Society under Max Planck-India partner group project and the Board of Research in Nuclear Sciences (58/20/03/2021- BRNS, DAE-YSRA), Department of Atomic Energy (DAE), Government of India. H M L N acknowledges support from the Alexander von Humboldt Foundation through a Research Fellowship for Postdoctoral Researchers. Research in Dresden benefits from the environment provided by the DFG Cluster of Excellence ct.qmat (EXC 2147, project ID 390858940).",

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T1 - Observation of an anomalous Hall effect in single-crystal Mn3Pt

AU - Zuniga-Cespedes, Belén E

AU - Manna, Kaustuv

AU - Noad, Hilary M L

AU - Yang, Po-ya

AU - Nicklas, Michael

AU - Felser, Claudia

AU - Mackenzie, Andrew P

AU - Hicks, Clifford W

N1 - Acknowledgments We thank Peter Milde, Yan Sun, and Binghai Yan for useful discussions. We thank in addition Tomoya Higo and Satoru Nakatsuji for critical readings of our manuscript, and Hua Chen for assistance with the piezomagnetic tensor. We also thank Renate Hempel-Weber and Ulrike Ließ for technical assistance. We acknowledge the financial support of the Max Planck Society. BZ, CF, APM, and CWH acknowledge in addition financial support from the Deutsche Forschungsgemeinschaft through SFB 1143 (Project ID 247310070). KM and CF acknowledge financial support from the European Research Council (ERC), Advanced Grant No. 742068 'TOPMAT'; European Union's Horizon 2020 research and innovation program (Grant Nos. 824123 and 766566). Additionally, KM acknowledges funding support from Max Planck Society under Max Planck-India partner group project and the Board of Research in Nuclear Sciences (58/20/03/2021- BRNS, DAE-YSRA), Department of Atomic Energy (DAE), Government of India. H M L N acknowledges support from the Alexander von Humboldt Foundation through a Research Fellowship for Postdoctoral Researchers. Research in Dresden benefits from the environment provided by the DFG Cluster of Excellence ct.qmat (EXC 2147, project ID 390858940).

PY - 2023/2/24

Y1 - 2023/2/24

N2 - 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 smaller spontaneous ferromagnetic moments 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.

AB - 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 smaller spontaneous ferromagnetic moments 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.

U2 - 10.1088/1367-2630/acbc3f

DO - 10.1088/1367-2630/acbc3f

M3 - Article

SN - 1367-2630

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JF - New Journal of Physics

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