Dielectric properties of PZT-based compositions on the morphotropic phase boundary

Taking into consideration that the ferroceramic compositions investigated b y us belong presumably to the morphotropic phase boundary, we have studied manifestations of the thermal memory effect under intermediate and strong a c-fields in low and infralow frequency ranges in the systems under examinat ion. The conclusion has been drawn that the principal role in the developme nt of the thermal memory effect belongs to the domain and interphase bounda ries' interaction with defects. The specificities of this interaction in di fferent conditions are discussed.