Ferroelectric, glassy and relaxor states in PLZT ceramics and related compounds

Abstract Based on various experimental results of the literature, including mainly electrical and Raman studies, a tentative explanation of the evolution of the behaviour of lanthanum modified lead zirconate titanate (PLZT) ceramics is given. The composition 9/65/35 is more specifically addressed as an example of relaxor in this series. An extended phase diagram is outlined.