Noncollinear magnetic order, in-plane anisotropy, and magnetoelectric coupling in a pyroelectric honeycomb antiferromagnet Ni$_{2}$Mo$_{3}$O$_{8}$

Poonam Yadav; Suheon Lee; G. L. Pascut; Jaewook Kim; Matthias J. Gutmann; Xianghan Xu; Bin Gao; Sang-Wook Cheong; Valery Kiryukhin; Sungkyun Choi

doi:10.1103/PhysRevResearch.5.033099

paper

Noncollinear magnetic order, in-plane anisotropy, and magnetoelectric coupling in a pyroelectric honeycomb antiferromagnet Ni $_{2}$ Mo $_{3}$ O $_{8}$

arXiv:2304.14641 · doi:10.1103/PhysRevResearch.5.033099

Abstract

Ni $_{2}$ Mo $_{3}$ O $_{8}$ is a pyroelectric honeycomb antiferromagnet exhibiting peculiar changes of its electric polarization at magnetic transitions. Ni $_{2}$ Mo $_{3}$ O $_{8}$ stands out from the isostructural magnetic compounds, showing an anomalously low magnetic transition temperature and unique magnetic anisotropy. We determine the magnetic structure of Ni $_{2}$ Mo $_{3}$ O $_{8}$ 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 \textit{P $_{C}$ na}2 $_{1}$ . The in-plane magnetic connection is of the stripy type both for the $ab$ -plane and the $c$ -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 Ni $_{2}$ Mo $_{3}$ O $_{8}$ 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 new insights into its magnetoelectric coupling and polarization. Thus, our results deliver essential information for understanding both the unusual magnetoelectric properties of Ni $_{2}$ Mo $_{3}$ O $_{8}$ and the prospects for observation of exotic nonreciprocal, Hall, and magnonic effects characteristic to this compound family.

28 pages, 23 figures, 14 tables

Noncollinear magnetic order, in-plane anisotropy, and magnetoelectric coupling in a pyroelectric honeycomb antiferromagnet Ni $_{2}$ Mo $_{3}$ O $_{8}$

Abstract

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Noncollinear magnetic order, in-plane anisotropy, and magnetoelectric coupling in a pyroelectric honeycomb antiferromagnet Ni2​Mo3​O8​

Abstract

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Cited by in corpus (3)

Noncollinear magnetic order, in-plane anisotropy, and magnetoelectric coupling in a pyroelectric honeycomb antiferromagnet Ni $_{2}$ Mo $_{3}$ O $_{8}$