Abstract

Five nominally undoped BaTiO3 crystals, processed at oxygen partial pressures of 1, 10-5, 10-8, 10-11, and 10-14 atm at 900 °C, were fabricated and systematically investigated. The compensation point was found to be near the annealing level of 10-10-atm oxygen partial pressure. Annealing can vary dark conductivity, the effects of deep–shallow traps and hole–electron competition, and photorefractive properties such as two-beam coupling and response time.

© 1999 Optical Society of America

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