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    • Keywords


      Spinel; ac conductivity; frequency response

    • Abstract


      ac Conductivity measurements are carried out across the metal to insulator transition in NiAl0.7Cr0.7Fe0.6O4. The low frequency data is analyzed using Summerfield scaling theory for hopping conductivity. The exponent of the scaling behavior has significantly different values in the conducting and insulating regimes. The hopping frequency and the zero frequency conductivity are found to increase with temperature, slowly in the metallic regime and rapidly in the insulating regime.

    • Author Affiliations


      A K Rajarajan1 SM Yusuf1 P Balaya2 RG Kulkarni3

      1. Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai - 400 085, India
      2. IUC-DAEF Mumbai Centre, Bhabha Atomic Research Centre, Mumbai - 400 085, India
      3. Department of Physics, Saurashtra University, Rajkot - 360 005, India
    • Dates

  • Pramana – Journal of Physics | News

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      Posted on July 25, 2019

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