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Title: Large anomalous Hall effect in the chiral-lattice antiferromagnet CoNb 3S 6

Abstract

An ordinary Hall effect in a conductor arises due to the Lorentz force acting on the charge carriers. In ferromagnets, an additional contribution to the Hall effect, the anomalous Hall effect (AHE), appears proportional to the magnetization. While the AHE is not seen in a collinear antiferromagnet, with zero net magnetization, recently it has been shown that an intrinsic AHE can be non-zero in non-collinear antiferromagnets as well as in topological materials hosting Weyl nodes near the Fermi energy. Here we report a large anomalous Hall effect with Hall conductivity of 27 Ω -1 cm -1 in a chiral-lattice antiferromagnet, CoNb 3S 6 consisting of a small intrinsic ferromagnetic component (approximate to 0.0013 μ B per Co) along c-axis. This small moment alone cannot explain the observed size of the AHE. Finally, we attribute the AHE to either formation of a complex magnetic texture or the combined effect of the small intrinsic moment on the electronic band structure.

Authors:
 [1];  [1];  [1]; ORCiD logo [1];  [2];  [1]
  1. Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
  2. Univ. of Chicago, IL (United States). ChemMatCARS
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Science Foundation (NSF)
OSTI Identifier:
1471511
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 9; Journal Issue: 1; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Anomalous Hall effect; Chiral magnetic textures; Non-collinear antiferromagnet; Non-coplanar antiferromagnet; Weyl semimetal

Citation Formats

Ghimire, Nirmal J., Botana, A. S., Jiang, J. S., Zhang, Junjie, Chen, Y. -S., and Mitchell, J. F. Large anomalous Hall effect in the chiral-lattice antiferromagnet CoNb3S6. United States: N. p., 2018. Web. doi:10.1038/s41467-018-05756-7.
Ghimire, Nirmal J., Botana, A. S., Jiang, J. S., Zhang, Junjie, Chen, Y. -S., & Mitchell, J. F. Large anomalous Hall effect in the chiral-lattice antiferromagnet CoNb3S6. United States. doi:10.1038/s41467-018-05756-7.
Ghimire, Nirmal J., Botana, A. S., Jiang, J. S., Zhang, Junjie, Chen, Y. -S., and Mitchell, J. F. Thu . "Large anomalous Hall effect in the chiral-lattice antiferromagnet CoNb3S6". United States. doi:10.1038/s41467-018-05756-7. https://www.osti.gov/servlets/purl/1471511.
@article{osti_1471511,
title = {Large anomalous Hall effect in the chiral-lattice antiferromagnet CoNb3S6},
author = {Ghimire, Nirmal J. and Botana, A. S. and Jiang, J. S. and Zhang, Junjie and Chen, Y. -S. and Mitchell, J. F.},
abstractNote = {An ordinary Hall effect in a conductor arises due to the Lorentz force acting on the charge carriers. In ferromagnets, an additional contribution to the Hall effect, the anomalous Hall effect (AHE), appears proportional to the magnetization. While the AHE is not seen in a collinear antiferromagnet, with zero net magnetization, recently it has been shown that an intrinsic AHE can be non-zero in non-collinear antiferromagnets as well as in topological materials hosting Weyl nodes near the Fermi energy. Here we report a large anomalous Hall effect with Hall conductivity of 27 Ω-1 cm-1 in a chiral-lattice antiferromagnet, CoNb3S6 consisting of a small intrinsic ferromagnetic component (approximate to 0.0013 μB per Co) along c-axis. This small moment alone cannot explain the observed size of the AHE. Finally, we attribute the AHE to either formation of a complex magnetic texture or the combined effect of the small intrinsic moment on the electronic band structure.},
doi = {10.1038/s41467-018-05756-7},
journal = {Nature Communications},
number = 1,
volume = 9,
place = {United States},
year = {2018},
month = {8}
}

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