• Thermopower of non-superconducting and superconducing Nd1·85Ce0·15CuO4−y samples

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      https://www.ias.ac.in/article/fulltext/boms/014/03/0831-0835

    • Keywords

       

      Electron superconductor; thermopower; phonon drag; electron diffusion

    • Abstract

       

      The thermopower of single-phase samples of Nd1·85Ce0·15CuO4−y was measured from 250 K down to 10 K. The as-prepared sample was not superconducting. It had a negative thermopower at 250 K, whose magnitude increased as temperature was decreased to 95 K. A further reduction in temperature caused a decrease in magnitude of thermopower. The sign of the thermopower changes to positive at 12 K. The superconducting sample also showed the same behaviour but the change of sign now occurred at 40 K. Below 40 K, the thermopower showed a positive peak and reduced to zero at the superconducting transition. These results were compared with previous studies.

    • Author Affiliations

       

      V Vijayashree1 C K Subramaniam1 R Srinivasan1

      1. Department of Physics, Indian Institute of Technology, Madras - 600 036, India
    • Dates

       
  • Bulletin of Materials Science | News

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