Fabrication and optical properties of ultrathin ferromagnet/superconductor metallic bilayers (Articolo in rivista)

Type
Label
  • Fabrication and optical properties of ultrathin ferromagnet/superconductor metallic bilayers (Articolo in rivista) (literal)
Anno
  • 2005-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1109/TASC.2005.848667 (literal)
Alternative label
  • G. P. Pepe (a); L. Parlato (a); R. Latempa (a); P. D'Acunto (a); N. Marrocco (a); C. De Lisio (a); C. Altucci (a); G. Peluso (a); A. Barone (a); T. Taneda (b); Roman Sobolewski (b) (2005)
    Fabrication and optical properties of ultrathin ferromagnet/superconductor metallic bilayers
    in IEEE transactions on applied superconductivity (Print); IEEE-Institute Of Electrical And Electronics Engineers Inc., Piscataway (Stati Uniti d'America)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • G. P. Pepe (a); L. Parlato (a); R. Latempa (a); P. D'Acunto (a); N. Marrocco (a); C. De Lisio (a); C. Altucci (a); G. Peluso (a); A. Barone (a); T. Taneda (b); Roman Sobolewski (b) (literal)
Pagina inizio
  • 2942 (literal)
Pagina fine
  • 2945 (literal)
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  • http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=1440285 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 15 (literal)
Rivista
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  • 4 (literal)
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  • 2 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • (a) Coherentia INFM and University of Naples, Dipartimento Scienze Fisiche, Facoltà di Ingegneria, 80125 Napoli, Italy (b) Department of Electrical Engineering and Laboratory for Laser Energetics, University of Rochester, Rochester, NY 14627 USA (literal)
Titolo
  • Fabrication and optical properties of ultrathin ferromagnet/superconductor metallic bilayers (literal)
Abstract
  • Ferromagnet/superconductor (F/S) bilayers composed of ultrathin metallic films demonstrate new proximity effects and show a peculiar behavior of the superconductor-order parameter. In terms of applications, F films provide additional \"anchoring\" of the S film vortex lattice, resulting in increased critical current. By changing composition and the thickness ratio of the F/S bilayer, one can modify the quasiparticle dynamics through an effective enhancement or suppression of the quasiparticle lifetime under nonequilibrium conditions. The latter effect should lead to \"custom-designed\" superconducting detectors, with the sensitivity and photoresponse speed tailored to a given application. We present fabrication details of nanometer-thickness NiCu/Nb bilayers of different F/S ratios. The NiCu/Nb structures have been implemented to fabricate Josephson junctions and tested using femtosecond optical spectroscopy. The time-resolved photoresponse experiments allowed us to measure the quasiparticle relaxation dynamics in our bilayers. In addition, the photoresponse temperature dependence studies revealed the spatial evolution of the superconductor-order parameter across the bilayer. Comparison between the bilayer data and the single-material data is also presented. (literal)
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