Abstract
Polarization-related electrostrictive coefficients Qhhave been determined for relaxation dielectrics 0.856Sr T1O3-O.144 Bi23TiO3and (K3, 4Bi, 4) (Zn1/6Nb5, 6)O3, and for a simple non-polar perovskite BaZr03by measuring the hydrostatic pressure dependence of the dielectric permittivity. Anomalous variation in the electrostrictive coefficient with temperature and frequency were observed in (K3/4Bi1/4) (Znt/6Nb5/6)O3in the relaxation-temperature region. This behavior can be explained qualitatively with a simple model based on potential barriers separating alternative cation sites. The empirical rule noted previously for ferroelectric perovskites, that the electrostrictive Q coefficient increases with cation order from disordered, through simple and then ordered perovskites is confirmed again in non-polar perovskites.
Original language | English (US) |
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Pages (from-to) | 333-341 |
Number of pages | 9 |
Journal | Phase Transitions |
Volume | 1 |
Issue number | 4 |
DOIs | |
State | Published - Nov 1980 |
All Science Journal Classification (ASJC) codes
- Instrumentation
- General Materials Science