Domain wall motion concept to describe ferroelectric rhombohedral PLZT ceramics

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Abstract
Recent studies of hot-pressed PLZT 6/65/35 ceramics have shown that the electrically induced polarization reversal in these materials is characterized by non-180° processes. External and internal produced 71° and 109° domain wall pressures have proved to be responsible for domain wall motions. In this paper the data for electrically and mechanically caused depolarization of initially poled ferroelectric ceramic samples are given and shown to be in quantitative accordance with theoretical requirements of a domain wall motion concept. Furthermore, a mathematical description is given for the hysteretic polarization and strain behaviour of these materials based upon the most significant results of the experiments concerning their domain wall motion properties.