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    • Keywords


      HighTc superconductors; lower critical field; AC methods; magnetization curves

    • Abstract


      We have studied the hysteresis loops of RBa2Cu3O7 (R=Gd, Ho and Y) and detected anomalies in some of them. The observed anomalies support a recent prediction by Ravi Kumar and Chaddah based on an extension of Bean’s model. The anomalies indicate lowHc1 values and we have confirmed this by studying the onset of low-field hysteresis in less than 10 Oe at 77 K for these highTc superconductors.

    • Author Affiliations


      A K Grover1 C Radhakrishnamurty1 P Chaddah1 2 G Ravi Kumar1 2 G V Subbarao1 3

      1. Tata Institute of Fundamental Research, Bombay - 400 005, India
      2. Bhabha Atomic Research Centre, Bombay - 400 085, India
      3. Indian Institute of Technology, Madras - 600 036, India
    • Dates

  • Pramana – Journal of Physics | News

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      Posted on July 25, 2019

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