Structural dependence of the elecro-optic properties of some plzt ceramics
- 1 January 1976
- journal article
- research article
- Published by Taylor & Francis in Ferroelectrics
- Vol. 12 (1) , 221-223
- https://doi.org/10.1080/00150197608241432
Abstract
Measurements of the birefringence of a series of PLZT ceramics with 7.5% lanthanum and Zr/Ti ratio varying from 50/50 to 76/24 are reported. It is found that an expression of the form Δn = -1/2n3gP2 is generally followed, where P is the polarization and the g coefficients are determined by the structure; for rhombohedral symmetries g = 0.020 m4/C2, for orthorhombic symmetriess g = 0.017 m4/C2, for tetragonal symmetries g = 0.011 m4/C2. Under certain conditions of composition and field, g coefficients lie between those determined for the tetragonal and ortho-rhombic symmetries, suggesting the presence of a mixture of tetragonal and orthorhombic grains. The tetragonal-orthorhombic phase change has been followed utilizing the change in g coefficients.Keywords
This publication has 2 references indexed in Scilit:
- Observation of orthorhombic→tetragonal→cubic phase transitions in some PLZT ceramicsApplied Physics Letters, 1975
- Phase identification and domain structure in PLZT ceramicsJournal of Applied Physics, 1975