S. Cohen, T.O. Sedgwick, et al.
MRS Proceedings 1983
We report measurements of the optic index of refraction as a function of temperature, n (T), in the crystalline ferroelectrics having the simple perovskite (ABO3) structure. We show that these crystals possess a local, randomly oriented, nonreversible polarization below a temperature Td several hundred degrees above the ferroelectric phase-transition temperature Tc. Using a simple model, we account for this behavior and understand quantitatively the values of Td. This model, we believe, contains the basic physical understanding of ferroelectrics with a diffuse phase transition. © 1983 The American Physical Society.
S. Cohen, T.O. Sedgwick, et al.
MRS Proceedings 1983
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