• S Sagar

      Articles written in Bulletin of Materials Science

    • On conduction mechanism in paramagnetic phase of Gd based manganites

      S Sagar M R Anantharaman

      More Details Abstract Fulltext PDF

      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.

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