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Effect of swift heavy ion irradiation on surface resistance of DyBa2Cu3O7-δ thin films at microwave frequencies

  • Physics Of Vortex State
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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.

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Authors and Affiliations

  1. Department of Materials Science, Mangalore University, 574 199, Mangalagangothri, India

    Ujwala Ail

  2. Tata Institute of Fundamental Research, Homi Bhabha Road, 400 005, Mumbai, India

    Tamalika Banerjee & R Pinto

  3. Electronics Department, K.C. College, 400 020, Mumbai, India

    A R Bhangale

  4. Aruna Asaf Ali Marg, Nuclear Science Centre, 110 067, New Delhi, India

    D Kanjilal

Authors
  1. Ujwala Ail
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  2. Tamalika Banerjee
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  3. A R Bhangale
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  4. D Kanjilal
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  5. R Pinto
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Ail, U., Banerjee, T., Bhangale, A.R. et al. Effect of swift heavy ion irradiation on surface resistance of DyBa2Cu3O7-δ thin films at microwave frequencies. Pramana - J Phys 58, 959–963 (2002). https://doi.org/10.1007/s12043-002-0200-7

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  • DOI: https://doi.org/10.1007/s12043-002-0200-7

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