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    • Keywords


      Harmonic generation; thin film YBCO; laser ablation

    • Abstract


      The generation of harmonics in a laser ablated YBCO film deposited on a 〈100〉 MgO substrate is reported. Higher odd harmonics appeared when the film was subjected to an ac field. The presence of a dc field induces only the second harmonic with a small value of slope ofV2Hdc curve (δV2/δHdc) compared to bulk YBCO. The variation of the amplitude of third harmonic (V3) withHac and temperature was studied. These results are explained in terms of a critical state model. The observation of only a small amplitude of second harmonic (V2) with a smallδV2/δHdc is explained in terms of a special kind of clean grain boundary present in YBCO laser ablated films on 〈100〉 MgO.

    • Author Affiliations


      Neeraj Khare1 J R Buckley2 R M Bowman2 G B Donaldson2 C M Pegrum2

      1. National Physical Laboratory, Superconductivity Group, New Delhi - 110 012, India
      2. Department of Physics and Applied Physics, University of Strathclyde, Glasgow - G4 ONG, Scotland
    • Dates

  • Pramana – Journal of Physics | News

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      Posted on July 25, 2019

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