Surface impedance of R-1(NdxBa2-x)Cu3O7-delta (R = Nd, Y) thin films (Articolo in rivista)

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  • Surface impedance of R-1(NdxBa2-x)Cu3O7-delta (R = Nd, Y) thin films (Articolo in rivista) (literal)
Anno
  • 2002-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1016/s0921-4534(02)00836-5 (literal)
Alternative label
  • Salluzzo, M. and Andreone, A. and Cassinese, A. and Di Capua, R. and Di Gennaro, E. and Iavarone, M. and Maglione, M. G. and Vaglio, R. (2002)
    Surface impedance of R-1(NdxBa2-x)Cu3O7-delta (R = Nd, Y) thin films
    in Physica. C, Superconductivity (Print); Elsevier, Amsterdam (Paesi Bassi)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Salluzzo, M. and Andreone, A. and Cassinese, A. and Di Capua, R. and Di Gennaro, E. and Iavarone, M. and Maglione, M. G. and Vaglio, R. (literal)
Pagina inizio
  • 703 (literal)
Pagina fine
  • 705 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://dx.doi.org/10.1016/S0921-4534(02)00836-5 (literal)
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  • 372 (literal)
Rivista
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  • 3 (literal)
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  • ISI Web of Science (WOS) (literal)
  • Google Scholar (literal)
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  • INFM and Dipartimento di Scienze Fisiche, Universit!a di Napoli Federico II, Piazzale Tecchio 80, 80125 Napoli, Italy (literal)
Titolo
  • Surface impedance of R-1(NdxBa2-x)Cu3O7-delta (R = Nd, Y) thin films (literal)
Abstract
  • We have studied the effect of Nd/Ba substitution on the superconducting properties of R-1(Nd4Ba2-lambda)Cu3O7 (R = Nd, Y) thin films by using microwave penetration depth and surface resistance measurements. Data on samples characterised by a Nd-excess of 4-5% have been collected by using a microstrip resonator at frequencies of 1.44 and 9.7 GHz and a symmetric dielectric resonator technique in TE011 mode at 19.8 GHz. A quadratic bT(2) low temperature dependence of the penetration depth is observed for the Nd-rich samples, with the coefficient b decreasing with the frequency. The data can be reasonably explained in a d-wave framework supposing that Nd at Ba site behaves, both in Nd1+x Ba2-lambda Cu3O7 and Y-iota(NdxBa2-lambda)Cu3O7, as a resonant impurity, as confirmed by scanning tunnelling spectroscopy. The changes of the temperature dependence of the penetration depth with the frequency can be explained with a two fluid approach taking into account the frequency dependence of the complex conductivity. (C) 2002 Elsevier Science B.V. All rights reserved. (literal)
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