• On conduction mechanism in paramagnetic phase of Gd based manganites

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    • Keywords

       

      Manganite; conduction mechanism; small polaron hopping; variable range hopping.

    • Abstract

       

      Materials belonging to the family of manganites are technologically important since they exhibit colossal magneto resistance. A proper understanding of the transport properties is very vital in tailoring the properties. A heavy rare earth doped manganite like Gd0.7Sr0.3MnO3 is purported to be exhibiting unusual properties because of smaller ionic radius of Gd. Gd0.7Sr0.3MnO3 is prepared by a wet solid state reaction method. The conduction mechanism in such a compound has been elucidated by subjecting the material to low temperature d.c. conductivity measurement. It has been found that the low band width material follows a variable range hopping (VRH) model followed by a small polaron hopping (SPH) model. The results are presented here.

    • Author Affiliations

       

      S Sagar1 2 M R Anantharaman1

      1. Department of Physics, Cochin University of Science and Technology, Cochin 682 022, India
      2. Department of Physics, Govt. Polytechnic College, Adoor 691 523, India
    • Dates

       
  • Bulletin of Materials Science | News

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