• Fulltext

       

        Click here to view fulltext PDF


      Permanent link:
      https://www.ias.ac.in/article/fulltext/pram/058/05-06/0959-0963

    • Keywords

       

      Microwave surface resistance; superconductors; peak effect; ion irradiation

    • Abstract

       

      We report the observation of a propounced peak in surface resistance at microwave frequencies of 4.88 GHz and 9.55 GHz and its disappearance after irradiation with swift ions in laser ablated DyBa2Cu3O7-δ (DBCO) thin films. The measurements were carried out in zero field as well as in the presence of magnetic fields (up to 0.8 T). The films were irradiated using 90 MeV oxygen ions at Nuclear Science Centre, New Delhi at a fluence of 3×1013 ions/cm2. Introduction of point defects and extended defects after irradiation suppresses the peak at 9.55 GHz whereas no suppression is observed at 4.88 GHz. These results and the vortex dynamics in the films at microwave frequencies before and after irradiation are discussed.

    • Author Affiliations

       

      Ujwala Ail1 Tamalika Banerjee2 A R Bhangale3 D Kanjilal4 R Pinto2

      1. Department of Materials Science, Mangalore University, Mangalagangothri - 574 199, India
      2. Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai - 400 005, India
      3. Electronics Department, K.C. College, Mumbai - 400 020, India
      4. Aruna Asaf Ali Marg, Nuclear Science Centre, New Delhi - 110 067, India
    • Dates

       
  • Pramana – Journal of Physics | News

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

© 2017-2019 Indian Academy of Sciences, Bengaluru.