Galvanomagnetic Investigations of the Bi_1−xSb_x(0<x<0.15) System at 77°K

Abstract

The electrical conductivities, the Hall and magnetoresistance coeffcients in Bi₉₇Sb₃, Bi₉₀Sb₁₀ and Bi₈₅Sb₁₅ alloy single crystals have been measured at liquid nitrogen temperature. Under the tentative assumptions of independent three valley bands for both the valence and conduction bands and isotropic relaxation times for both holes and electrons for each alloy, a set of three principal electron mobilities μ_i, a set of three principal hole mobilities ν_i, angles of tilt for each energy ellipsoid, θ_e and θ_h, and the carrier density N have been calculated using Freedman-Juretschke’s computer calculation technique for each alloy. From the results it seems that the conduction band retains the symmetry and general features of the Bi conduction band.