Considerations on Dielectric Properties of Relaxors

Abstract

The spontaneous polarization and dielectric susceptibility of relaxors have been calculated for the second and the first order transition cases on the basis of the assumed Gaussian distribution of the transition temperatures. Dispersion of the susceptibility is obtained on the effective medium approximation. The obtained frequency dependences of the temperatures, where the susceptibility attains peak values, are found to agree qualitatively with the experimental results.