Proximity effect in planar superconducting tunnel junctions containing Nb/NiCu superconductor/ferromagnet bilayers (Articolo in rivista)

Type
Label
  • Proximity effect in planar superconducting tunnel junctions containing Nb/NiCu superconductor/ferromagnet bilayers (Articolo in rivista) (literal)
Anno
  • 2006-01-01T00:00:00+01:00 (literal)
Alternative label
  • Pepe, GP; Latempa, R; Parlato, L; Ruotolo, A; Ausanio, G; Peluso, G; Barone, A; Golubov, AA; Fominov, YV; Kupriyanov, MY (2006)
    Proximity effect in planar superconducting tunnel junctions containing Nb/NiCu superconductor/ferromagnet bilayers
    in Physical review. B, Condensed matter and materials physics (Online)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Pepe, GP; Latempa, R; Parlato, L; Ruotolo, A; Ausanio, G; Peluso, G; Barone, A; Golubov, AA; Fominov, YV; Kupriyanov, MY (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 73 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Univ Naples Federico II, Coherentia INFM, Dipartimento Sci Fisiche, I-80125 Naples, Italy; Univ Twente, Fac Sci & Technol, NL-7500 AE Enschede, Netherlands; RAS, LD Landau Theoret Phys Inst, Moscow 119334, Russia; Moscow MV Lomonosov State Univ, Inst Nucl Phys, Moscow 119899, Russia (literal)
Titolo
  • Proximity effect in planar superconducting tunnel junctions containing Nb/NiCu superconductor/ferromagnet bilayers (literal)
Abstract
  • We present experimental results concerning both the fabrication and characterization of superconducting tunnel junctions containing superconductor/ferromagnet (S/F) bilayers made by niobium (S) and a weak ferromagnetic Ni0.50Cu0.50 alloy. Josephson junctions have been characterized down to T=1.4 K in terms of current-voltage I-V characteristics and Josephson critical current versus magnetic field. By means of a numerical deconvolution of the I-V data the electronic density of states on both sides of the S/F bilayer has been evaluated at low temperatures. Results have been compared with theoretical predictions from a proximity model for S/F bilayers in the dirty limit in the framework of Usadel equations for the S and F layers, respectively. The main physical parameters characterizing the proximity effect in the Nb/NiCu bilayer, such as the coherence length and the exchange field energy of the F metal, and the S/F interface parameters have been also estimated. (literal)
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