Optical gyration G, birefringence Δn and their electric-field E dependences of transparent ceramics of Pb0.92La0.08(Zr0.65Ti0.35)0.98O3 were studied by using high accuracy universal polarimeter (HAUP) in a temperature range between 10°C and 130°C. The high-temperature phase manifested neither spontaneous nor induced G, while the low-temperature phase did characteristic hysteresis loops of G and Δn with respect to E. Group-theoretical consideration of gyro-optical properties of both phases led us to the conclusion that the high- and low-temperature phases are cubic Th and trigonal C3, the same as found in Pb0.92La0.08(Zr0.70Ti0.30)0.98O3 ceramics. The free-energy function of both phases was determined by using these electro-optic effects. It is found that both ceramics undergo the same phase transition and manifest similar dielectric and optical properties.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics