Dielectric response of disordered ferroelectrics with embedded charged clusters

Abstract

The model of static charged clusters, which adequately describes the dielectric hysteresis and permittivity of disordered ferroelectrics with non-isovalent impurities, has been proposed. The main result of paper is modified Landau-Ginzburg-Devonshire equation can be applied to the bulk ferroelectric materials with improper conductivity and movable charge fluctuations near the impurity centers.