Cluster-components model interpretation of the concentration dependence of electrical conductivity in doped ionic crystals containing Frenkel defects

Abstract

The cluster-components method is used to study defect behavior and to describe the “property — composition” dependence in binary ionic compounds. A qualitative estimate of the concentration dependence of defects is given, together with the “electrical conductivity — composition” dependence based on the defects. It is shown that when linear approximation for the concentration dependences on a single type of defect are coupled with the experimental data, one can describe the concentration dependence of the electrical conductivity. The calculated results are in good agreement with experiment. The dependence on vacancy and interstitial concentration can be used to calculate other properties.