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Title: Large anomalous Hall effect in the chiral-lattice antiferromagnet CoNb3S6

Journal Article · · Nature Communications

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.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1471511
Journal Information:
Nature Communications, Vol. 9, Issue 1; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 83 works
Citation information provided by
Web of Science

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Cited By (2)

Critical behavior of intercalated quasi-van der Waals ferromagnet F e 0.26 Ta S 2 journal November 2019
Creating Weyl nodes and controlling their energy by magnetization rotation text January 2019