The delay time of phase transition to the polar phase in relaxor ferroelectrics

Abstract

We measured the time dependence behavior of the dielectric permittivity of lead lanthanum zirconate titanate (PLZT) transparent ceramic sample and a single-crystal lead magnoniobate (PMN) from the moment of the field application at certain temperatures after the zero-field cooled regime. The delay time of the phase transition from the glasslike state to the field-induced ferroelectric state was determined from the sharp change in the dielectric permittivity in PMN single crystal. The same transition in PLZT has more smooth behavior. We found the temperature dependence of the delay time of the phase transition under ultraviolet illumination for PMN single crystal.