• Thermoelectric power and ac conductivity of A-type Nd2O3

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      https://www.ias.ac.in/article/fulltext/pram/010/02/0173-0177

    • Keywords

       

      Thermoelectric power; electrical conductivity; polarons; neodymium sesquioxide

    • Abstract

       

      Measurement of thermoelectric power Θ of pressed pellets of A-type Nd2O3 from 550 to 1180K and electrical conductivity (σ) at dc, 50 Hz, 1.542 kHz and 3 kHz at different temperatures is reported. It is concluded that electrical conduction at high temperature (T>600K) in this solid is due to positive large polarons in O2− : 2p (valence) band and negative intermediate polarons in Nd3+ : 5d (conduction band). The energy band gap of the solid has been found to be 2.44 eV. At low temperatures, conduction by hopping of charge carriers from one impurity centre to another has been predicted.

    • Author Affiliations

       

      Virendra Pratap1 B K Verma1

      1. Department of Physics, University of Gorakhpur, Gorakhpur - 273 001
    • Dates

       
  • Pramana – Journal of Physics | News

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