Field-induced reversible or irreversible lattice rearrangement of transparent PLZT 9/65/35 ferroelectric ceramics
- 1 February 1989
- journal article
- properties
- Published by Taylor & Francis in Ferroelectrics
- Vol. 90 (1) , 65-70
- https://doi.org/10.1080/00150198908211271
Abstract
Crystallographic parameters of the transparent PLZT 9/65/35 ferroelectric ceramics as functions of temperature (T = −190− +60°C) and applied field (E = ±20 kV/cm) as well as their kinetics have been studied by precision x-ray analysis, a method of complex diffraction profile analysis being used. The field-induced cubic to monoclinic transition reversible at temperatures T > T t becomes irreversible in the macroscopic polarized state at T < T t . The absence of macroscopic polarization in thermally depolarized state at cooling below T t in the absence of applied field is explained by random dipole and elastic field in the PLZT lattice caused by heterovalent substitution La3+ → Pb2+.Keywords
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