Transport of lanthanum ion and hole in LaCrO₃ determined by electrical conductivity measurements

Effective diffusion coefficient in LaCrO₃ was determined by transient electrical conductivity based on Fick's second law. The diffusion coefficient of La³⁺ ion was calculated from the effective diffusion coefficient. The diffusion coefficient of La³⁺ ion and the activation energy was in agreement with the reported value. The diffusion coefficient of hole in LaCrO₃ 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)CrO₃ (A=Sr, Ca). The diffusion coefficient of hole in LaCrO₃ was much higher than those of other components in LaCrO₃.