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Noncollinear magnetic order, in-plane anisotropy, and magnetoelectric coupling in the pyroelectric honeycomb antiferromagnet Ni2Mo3 O8

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Title
Noncollinear magnetic order, in-plane anisotropy, and magnetoelectric coupling in the pyroelectric honeycomb antiferromagnet Ni2Mo3 O8
Author(s)
Poonam Yadav; Suheon Lee; Pascut, G.L.; Kim, Jaewook; Gutmann, Matthias J.; Xu, Xianghan; Gao, Bin; Cheong, Sang-Wook; Kiryukhin, Valery; Sungkyun Choi
Publication Date
2023-08
Journal
Physical Review Research, v.5, no.3
Publisher
American Physical Society
Abstract
©2023 American Physical Society. Ni2Mo3O8 is a pyroelectric honeycomb antiferromagnet exhibiting peculiar changes in its electric polarization at magnetic transitions. Ni2Mo3O8 stands out from isostructural magnetic compounds, showing an anomalously low magnetic transition temperature and unique magnetic anisotropy. We determine the magnetic structure of Ni2Mo3O8 utilizing high-resolution powder and single-crystal neutron diffraction. A noncollinear stripy antiferromagnetic order is found in the honeycomb planes. The magnetic space group is PCna21. The in-plane magnetic connection is of the stripy type for both the ab-plane and c-axis spin components. This is a simpler connection than the one proposed previously. The ferromagnetic interlayer order of the c-axis spin components in our model is also distinct. The magnetic anisotropy of Ni2Mo3O8 is characterized by orientation-dependent magnetic susceptibility measurements on a single crystal, consistent with neutron diffraction analysis. The local magnetoelectric tensor analysis using our magnetic models provides insights into its magnetoelectric coupling and polarization. Thus, our results deliver essential information for understanding both the unusual magnetoelectric properties of Ni2Mo3O8 and the prospects for observing exotic nonreciprocal, Hall, and magnonic effects characteristic of this compound family. © 2023 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.
URI
https://pr.ibs.re.kr/handle/8788114/13934
DOI
10.1103/PhysRevResearch.5.033099
ISSN
2643-1564
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > 1. Journal Papers (저널논문)
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