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

      M D Sastry M Moghbel Putcha Venkateswarlu

      Volume 47 Issue 4 October 1996 pp 331-337

    • Fulltext

       

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/pram/047/04/0331-0337

    • 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

       
      Published
      October 1996
      Manuscript received
      3 June 1996

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