23 January 2002 Effects of annealing atmosphere on photorefractive BaTiO3
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Nominally undoped BaTiO3 crystals, processed in atmospheres of various oxygen partial pressure at 900 degree(s)C and 1000 degree(s)C, respectively, were fabricated and systematically investigated. The photorefractive properties are sequentially controlled by the factor from dark decay, deep/shallow trap, deep/shallow trap with hole/electron competition to dark conductivity, as the oxygen partial pressure is reduced. The trend is similar for both of the processing temperature, however, the compensation point is shifted about three of oxygen partial pressure. This can be attributed to a higher oxygen vacancy concentration st higher processing temperature.
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Jenq-Yang Chang, Jenq-Yang Chang, Chih-Ying Huang, Chih-Ying Huang, Ching-Cherng Sun, Ching-Cherng Sun, } "Effects of annealing atmosphere on photorefractive BaTiO3", Proc. SPIE 4459, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications VII, and Optical Data Storage, (23 January 2002); doi: 10.1117/12.453999; https://doi.org/10.1117/12.453999


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