• On some aspects of metallisation with special reference to iron group transition metal oxides

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/jcsc/096/06/0523-0532

    • Keywords

       

      Metallisation; 3d transition metal oxides; localisation

    • Abstract

       

      The metal-insulator transition in 3d transition metal oxides such as the ternary perovskite oxides as well as the binary oxides both as a function of composition and temperature are reviewed. The description of metallisation in terms of a change in sign of the temperature coefficient of resistance as well as conductivity at 0 K are considered in terms of modern theories based on localisation. It is pointed out that there may be grounds to believe that in the high temperature limit a resistivity less than ≈10−1 ohm cm may be associated with metallic properties despite a negative temperature coefficient of resistance. The correlation between magnetic and electrical properties have also been examined.

    • Author Affiliations

       

      P Ganguly1

      1. Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore - 560012, India
    • Dates

       
  • Journal of Chemical Sciences | News

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