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Spontaneous photorefractive effect in Sr1−x CaxTiO3 (x=0.014)
Authors:M. E. Guzhva  P. A. Markovin  W. Kleemann
Affiliation:1. A. F. Ioffe Physicotechnical Institute, Russian Academy of Sciences, 194021, St. Petersburg, Russia
2. Angewandte Physik, Gerhard-Mercator-Universit?t Duisburg, D-47048, Duisburg, Germany
Abstract:The temperature dependence of the principal values of the refractive index in Sr1−x CaxTiO3 (x=0.014) has been measured in the 17–275 K range under various conditions of sample illumination with 1.96 eV photons. The spontaneous photorefractive contribution δn ph to the temperature-induced variation of the refractive index of Sr1−x CaxTiO3, which appears after illumination of the sample in the ferrophase (transition temperature T c=32 K) and persists in the paraphase under heating up to 150 K, has been separated. The photoinduced polarization has been estimated. Fiz. Tverd. Tela (St. Petersburg) 39, 711–713 (April 1997)
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