A study on the nonlinear microwave electrodynamic response of e-beam evaporated MgB2 superconducting thin films (Articolo in rivista)

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  • A study on the nonlinear microwave electrodynamic response of e-beam evaporated MgB2 superconducting thin films (Articolo in rivista) (literal)
Anno
  • 2003-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1088/0953-2048/16/2/323 (literal)
Alternative label
  • Andreone, A. and Di Gennaro, E. and Lamura, G. and Salluzzo, M. and Purnell, A. and Cohen, L. F. and Hao, L. and Gallop, J. and Cantoni, C. and Paranthaman, M. (2003)
    A study on the nonlinear microwave electrodynamic response of e-beam evaporated MgB2 superconducting thin films
    in Superconductor science and technology (Print); IOP Publishing Ltd., Bristol BS1 6BE (Regno Unito)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Andreone, A. and Di Gennaro, E. and Lamura, G. and Salluzzo, M. and Purnell, A. and Cohen, L. F. and Hao, L. and Gallop, J. and Cantoni, C. and Paranthaman, M. (literal)
Pagina inizio
  • 260 (literal)
Pagina fine
  • 263 (literal)
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  • 16 (literal)
Rivista
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  • 4 (literal)
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  • 2 (literal)
Note
  • ISI Web of Science (WOS) (literal)
  • Google Scholar (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1 I.N.F.M. and Dipartimento Scienze Fisiche, Università Federico II, Napoli I-80125, Italy 2 Imperial College of Science, Technology and Medicine, London, SW7 2BZ, UK 3 National Physical Laboratory, Teddington, Middlesex TW11 0LW, UK 4 Oak Ridge National Laboratory, Oak Ridge, Tennessee, TN 37931-6056, USA (literal)
Titolo
  • A study on the nonlinear microwave electrodynamic response of e-beam evaporated MgB2 superconducting thin films (literal)
Abstract
  • We present a study on the temperature and field dependence of the microwave surface impedance Z(s) in thin films of the superconducting MgB2 compound. Samples were prepared by e-beam evaporation of boron on r-plane sapphire followed by an ex situ annealing in Mg vapour. Critical temperature values range between 26 and 38 K. Surface impedance measurements (Z(s) = R-s + iX(s)) were performed from 2 K close to T-c in the microwave region up to 20 GHz via parallel plate or dielectrically loaded resonators in 'symmetric' (two MgB2 films) and asymmetric (an MgB2 film and a commercial YBCO control film) configurations. At high microwave power, frequency domain measurements show a characteristic signature associated with weak links and this appears to be the limiting factor governing the performance of these films. (literal)
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