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An experimental investigation of YBa2Cu3O7 films at millimeter-wave frequencies

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Abstract

We have measured the millimeter-wave (100 GHz) surface resistance of high-quality laserdeposited YBa2Cu3O7 films on SrTiO3 and LaA103 substrates. Due to finite film thickness, radiation losses are important in the normal state and in the superconducting state nearT c. These effects are calculated andR s characteristic of the ohmics losses in the film are extracted from the data. The surface resistanceR s drops rapidly atT c, and a detailed comparison with calculations which include finite mean free path effects suggests a gap which exceeds the weak coupling BCS limit.

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Authors and Affiliations

  1. Department of Physics and Solid State Science Center, University of California, 90024, Los Angeles, California

    L. Drabeck, K. Holczer & G. Grüner

  2. Department of Physics, Wayne State University, 48202, Detroit, Michigan

    Jhy-Jiun Chang

  3. Department of Physics, University of California at Santa Barbara, 93106, Santa Barbara, California

    D. J. Scalapino

  4. Bellcore, 331 Newman Springs Road, 07701, Red Bank, New Jersey

    T. Venkatesan

Authors
  1. L. Drabeck
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  2. K. Holczer
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  3. G. Grüner
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  4. Jhy-Jiun Chang
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  5. D. J. Scalapino
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  6. T. Venkatesan
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Drabeck, L., Holczer, K., Grüner, G. et al. An experimental investigation of YBa2Cu3O7 films at millimeter-wave frequencies. Journal of Superconductivity 3, 317–322 (1990). https://doi.org/10.1007/BF00625274

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  • DOI: https://doi.org/10.1007/BF00625274

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