Dielectric tunability of relaxor-based ceramics

Abstract Dielectric tunability of the multicomponent ceramics based on the relaxor ferroelectrics was studied. It was shown that the dielectric behavior in electric field changed significantly during composition-induced crossover from a relaxor ferroelectric to a normal one. A correlation was found between the boundaries of different polar states and the parameters of the dielectric response under electric field. By the example of transition between ergodic relaxor and ferroelectric relaxor, it was shown that the dielectric tunability is a convenient tool that complements dielectric spectroscopy and X-ray diffraction in the construction and refinement of the x-T phase diagrams of relaxor ferroelectrics.