Abstract
We report accurate measurements of the temperature dependence of the indices of refraction [] in ferroelectric single crystals of for . Above the ferroelectric transition temperature , is linear with temperature. (It had been hoped that the sample would show nonlinear results similar to those observed in BaTi.) Analyzing below in terms of the quadratic electro-optic effect, , reveals very large values, 20-100 times larger than those observed in Pb perovskites.
- Received 6 April 1983
DOI:https://doi.org/10.1103/PhysRevB.28.2531
©1983 American Physical Society