Transport of lanthanum ion and hole in LaCrO 3 determined by electrical conductivity measurements

Abstract

Effective diffusion coefficient in LaCrO 3 was determined by transient electrical conductivity based on Fick's second law. The diffusion coefficient of La 3+ ion was calculated from the effective diffusion coefficient. The diffusion coefficient of La 3+ ion and the activation energy was in agreement with the reported value. The diffusion coefficient of hole in LaCrO 3 was also calculated from electrical conductivity and hole concentration. The hole concentration is estimated from the relation between the electrical conductivity and the amount of alkaline-earth in (La,A)CrO 3 (A=Sr, Ca). The diffusion coefficient of hole in LaCrO 3 was much higher than those of other components in LaCrO 3.