Diffusivity measurements have been made at 1000, 1100, and 1200 °C on LiNbO3-LiTaO3 single-crystal thin films prepared by melt-phase and liquid-phase epitaxy. The interdiffusion coefficient is determined to be D∼5×10−7 exp[−40(kcal/mol)/RT] cm2 sec−1. In addition, we found substantial reduction in opitcal scattering after a diffusion anneal.
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Chin et al. (1975) studied this question.
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