Transport and magnetic properties ofBaVSe3

Abstract

We report a comprehensive study of transport, magnetotransport, and magnetic properties of single crystals of ${\text{BaVSe}}_{3}$. The paramagnetic metal-ferromagnetic metal transition at 43 K was followed as a function of pressure by measuring the electrical resistivity and the thermoelectric power. The exponent of the low-temperature power-law dependence of the resistivity increases with pressure. The effective magnetic moment obtained from magnetic susceptibility in the paramagnetic regime is ${\ensuremath{\mu}}_{\text{eff}}=1.40{\ensuremath{\mu}}_{B}$. The study was completed by band-structure calculations based on density-functional theory both at ambient and high pressures. Transport coefficients of ${\text{BaVSe}}_{3}$ resemble the high-pressure phase of ${\text{BaVS}}_{3}$, which suggest that the replacement of sulfur with selenium can be viewed as chemical pressure.