Impurity mediated mechanism of photorefractive effect in BaTiO3: A combination of sangster and piezoelectric effects |
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| Authors: | M D Sastry M Moghbel Putcha Venkateswarlu |
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| Affiliation: | (1) Radiochemistry Division, Bhabha Atomic Research Centre, 400 085 Trombay, Mumbai, India;(2) Department of Physics, Alabama A & M University, 35762 Normal, Alabama, USA |
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| Abstract: | ![]()
An impurity mediated mechanism of photorefractive effect in BaTiO3 is proposed. The photoinduced changes in the relative concentration of Fe3+ in BaTiO3 results in an electro-optic coupling through a combination of the Sangster and piezoelectric effects. This is based on the examination of the extensive results on the EPR of Fe3+ in the BaTiO3 lattice. This model explains the improved photorefractive behavior of BaTiO3 on doping with Co2+. |
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| Keywords: | Photorefractive effect BaTiO3 Electron paramagnetic resonance of Fe3+ in BaTiO3 |
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