Electrical properties of the extruded Bi85Sb15 samples with lead and tellurium impurities

Full text : Effect of tellurium impurities on the electrical conductivity, seebeck coefficient and Hall constant of extruded samples Bi85Sb15 + 0.001 at Pb in the temperature range 77-300 K have studied. It has been found that tellurium impurities up to 0.001 atomic percent compensating acceptor atoms of the Pb led to the decrease of electrical conductivity, the growth of seebeck coefficient and Hall constant and at high concentrations led to strong growth of the electron density and therefore to an increase in electrical conductivity; the values of seebeck coefficient and Hall constant has been greatly reduced