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The electro-optic effects in the optically active 23 class compounds Bi12TiO20 (BTIO) and Bi40Ga2O63 (BGAO) have been investigated. Measurements were made of the electro-optic and electrogyration coefficients using longitudinal and transverse modes. Novel techniques employing a servo-driven Soleil compensator were used to obtain these coefficients. A value of η=17×10−12 rad m/V was obtained for the electrogyratory coefficient in the BTIO compound.
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Fox et al. (1975) studied this question.
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