Crystal Structures and Phase Transitions of the van-der-Waals Ferromagnet VI3

Abstract

The results of a single-crystal X-ray-diffraction study of the evolution of crystal structures of VI3 with temperature with emphasis on phase transitions are presented. Some related specific-heat and magnetization data are included. The existence of the room-temperature trigonal crystal structure R-3 (148) has been confirmed. Upon cooling, VI3 undergoes a structural phase transition to a monoclinic phase at Ts ~ 79 K. Ts is reduced in magnetic fields applied along the trigonal c-axis. When VI3 becomes ferromagnetic at TFM1 ~ 50 K, magnetostriction-induced changes of the monoclinic-structure parameters are observed. Upon further cooling, the monoclinic structure transforms into a triclinic variant at 32 K which is most likely occurring in conjunction with the previously reported transformation of the ferromagnetic structure. The observed phenomena are preliminarily attributed to strong magnetoelastic interactions.

References in corpus (3)

• Ferromagnetic van der Waals crystal VI3
• VI3 - a new layered ferromagnetic semiconductor
• Bulk properties of van-der-Waals hard ferromagnet VI3

Cited by in corpus (5)

• Ferroic orders in two-dimensional transition/rare-earth metal halides
• 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${}_3$
• Dynamical correlation enhanced orbital magnetization in VI${}_3$
• Symmetry Analysis of Tensors in the Honeycomb Lattice of Edge-Sharing Octahedra