Probing transport mechanisms of BaFe2As2 superconducting films and grain boundary junctions by noise spectroscopy (Articolo in rivista)

Type
Label
  • Probing transport mechanisms of BaFe2As2 superconducting films and grain boundary junctions by noise spectroscopy (Articolo in rivista) (literal)
Anno
  • 2014-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1038/srep06163 (literal)
Alternative label
  • Barone, C.; Romeo, F.; Pagano, S.; Adamo, M.; Nappi, C.; Sarnelli, E.; Kurth, F.; Iida, K. (2014)
    Probing transport mechanisms of BaFe2As2 superconducting films and grain boundary junctions by noise spectroscopy
    in Scientific reports (Nature Publishing Group)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Barone, C.; Romeo, F.; Pagano, S.; Adamo, M.; Nappi, C.; Sarnelli, E.; Kurth, F.; Iida, K. (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 4 (literal)
Rivista
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  • 5 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • University of Salerno; University of Salerno; CNR SPIN Napoli; Leibniz Inst Festkorper & Werkstoffforsch IFW Dre (literal)
Titolo
  • Probing transport mechanisms of BaFe2As2 superconducting films and grain boundary junctions by noise spectroscopy (literal)
Abstract
  • An important step forward for the understanding of high-temperature superconductivity has been the discovery of iron-based superconductors. Among these compounds, iron pnictides could be used for high-field magnet applications, resulting more advantageous over conventional superconductors, due to a high upper critical field as well as its low anisotropy at low temperatures. However, the principal obstacle in fabricating high quality superconducting wires and tapes is given by grain boundaries. In order to study these effects, the dc transport and voltage-noise properties of Co-doped BaFe2As2 superconducting films with artificial grain boundary junctions have been investigated. A specific procedure allows the separation of the film noise from that of the junction. While the former shows a standard 1/f behaviour, the latter is characterized by an unconventional temperature-dependent multi-Lorentzian voltage-spectral density. Moreover, below the film superconducting critical temperature, a peculiar noise spectrum is found for the grain boundary junction. Possible theoretical interpretation of these phenomena is proposed. (literal)
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