Electrical properties of liquid Ni–Se and Cu–Se alloys

Abstract

The electrical conductivities, σ, of liquid Cu–Se and Ni–Se alloys on the Se-rich side increase on the addition of Cu and Ni, respectively. The σs obtained at 1373 K are 1400, 5000, 4130 and 1920 Ω −1 cm −1 for liquid CuSe, NiSe, CoSe and FeSe, respectively. The thermoelectric power, S, of liquid Cu–Se alloys shows a p–n transition near the stoichiometric composition Cu 2Se. The Ss obtained at 1373 K are 70 and 4 μV/K for liquid CuSe and NiSe, respectively. The large values of σ for liquid transition metal–Se alloys are related to the density of d-like states at the Fermi level due to the p–d hybridization.