Lattice and magnetic structure in the van der Waals antiferromagnet VBr3

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 Néel 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.

13 pages, 4 figures

References in corpus (6)

• Evolution of interlayer and intralayer magnetism in three atomically thin chromium trihalides
• Crystal Structures and Phase Transitions of the van-der-Waals Ferromagnet VI3
• Magnetic order and its interplay with structure phase transition in van der Waals ferromagnet VI${}_3$
• Two-dimensional ferromagnetic spin-orbital excitations in the honeycomb VI${}_3$
• Crystal structure evolution in the van der Waals transition metal trihalides
• Terahertz Magnetic and Lattice Excitations in van der Waals Ferromagnet VI3