Abstract
AbstractThe electrical conductivity (σ), the magnetic susceptibility (χ), and the thermoelectric power (S) of liquid SbSe and BiSe alloys are measured as function of composition in the temperature range from the melting point to about 1000 °C. On adding Se to Sb and Bi σ indicates a rapid fall and χ has a sharp maximum of diamagnetism at the stoichiometric composition of M2Se3 in both the systems. A reversion of the sign of S is observed around the composition of Sb2Se3 in liquid SbSe alloys, while S in liquid BiSe alloys remains negative over a wide composition range including Bi2Se3. The calculated value of g (the ratio of real and free electron density of states at the Fermi level) using the observed values of σ begins to decrease in the vicinity of 50 at% Se and drops sharply at the concentration of 60 at% Se in both systems. Electronic properties obtained are discussed in the light of current transport theories employed in liquid semiconductors.
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