Lattice and magnetic structure in the van der Waals antiferromagnet VBr3

Yimeng Gu; Yiqing Hao; Zeyu Kao; Yiqing Gu; Feiyang Liu; Shiyi Zheng; Huibo Cao; Lunhua He; Jun Zhao

doi:10.1103/PhysRevB.110.064403

Lattice and magnetic structure in the van der Waals antiferromagnet VBr3

Strongly Correlated Electrons 2024-08-06 v1 Materials Science

Authors: Yimeng Gu , Yiqing Hao , Zeyu Kao , Yiqing Gu , Feiyang Liu , Shiyi Zheng , Huibo Cao , Lunhua He , Jun Zhao

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Abstract

We report a comprehensive investigation of the lattice and magnetic structure in van der Waals antiferromagnet VBr3, characterized by a BiI3-type structure at room temperature. Neutron diffraction experiments were performed on both polycrystalline and single-crystalline VBr3 samples, revealing clear magnetic Bragg peaks emerging below the N\'eel temperature of TN = 26.5 K. These magnetic Bragg peaks can be indexed by k = (0, 0.5, 1) in hexagonal notation. Our refinement analysis suggests that the antiferromagnetic order in VBr3 manifests as a zigzag structure. Moreover, we observed peak splitting for nuclear Bragg peaks in the HK-plane below the structure transition temperature of Ts = 94 K, indicating the breaking of 3-fold symmetry within the ab-plane.

Keywords

van der Waals antiferromagnet VBr3 neutron diffraction Néel temperature magnetic structure zigzag structure symmetry breaking

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@article{arxiv.2408.02589,
  title  = {Lattice and magnetic structure in the van der Waals antiferromagnet VBr3},
  author = {Yimeng Gu and Yiqing Hao and Zeyu Kao and Yiqing Gu and Feiyang Liu and Shiyi Zheng and Huibo Cao and Lunhua He and Jun Zhao},
  journal= {arXiv preprint arXiv:2408.02589},
  year   = {2024}
}

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13 pages, 4 figures

Lattice and magnetic structure in the van der Waals antiferromagnet VBr3

Abstract

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