Фізико-хімічні та електрофізичні дослідження твердих розчинів системи YbSe–YbTe

Abstract

YbSe–YbTe polythermal section of Yb-Se-Te ternary system has been studied by X-ray and microstructure analyses and by density measurement in whole range of concentrations. It was established than continions series of solid solutions of anion-anionic substitution are formed in YbSe– YbTe system. The value of a parameter of cubic cell grows monotonously with the increasing of Te content. Investigation of electric resistance dependence on temperature showed that YbSe1-хTeх solid solution have semiconducting type of conductivity. The width of forbidden zone increases from Eq = 0,95 eV for YbTe to Eq = 1,12 eV for YbSe. Energies of activation of electroconductivity of solid solutions were determined.