Magnetic Anisotropy of Paramagnetic and Ferromagnetically Ordered State of Single Crystal BaVSe₃

Abstract

Anisotropic magnetism of single crystal BaVSe₃ was studied for the first time by the combination of the susceptibility and torque methods. As reported previously for polycrystalline sample, BaVSe₃ undergoes ferromagnetic ordering below 43 K. Well above ferromagnetic ordering temperature, the torque measurements reveal a continuous symmetry change that influences the ordered state accordingly. We found ferromagnetic easy axis in the vanadium chain direction, i.e., along the crystallographic c-axis. The presence of two ferromagnetic domains of opposite magnetization direction signifies uniaxial symmetry of the ordered ferromagnetic state.