• Impurity mediated mechanism of photorefractive effect in BaTiO3: A combination of sangster and piezoelectric effects

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    • Keywords


      Photorefractive effect; BaTiO3; Electron paramagnetic resonance of Fe3+ in BaTiO3

    • 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+.

    • Author Affiliations


      M D Sastry1 2 M Moghbel2 Putcha Venkateswarlu2

      1. Radiochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai - 400 085, India
      2. Department of Physics, Alabama A & M University, Normal, Alabama - 35762, USA
    • Dates

  • Pramana – Journal of Physics | News

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      Posted on July 25, 2019

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