Abstract:
Switching processes in soft ferroelectric ceramic materials based on lead zirconate-titanate have been studied. It has been found that these materials, which possess properties of relaxors and have an additional low-frequency phase transition between two rhombohedral phases, $R3c\to R3m$, exhibit specific features upon the repolarization near this transition: in addition to the decrease in the coercive field, the domain compression effect disappears, which indicates changes in the switching mechanism.