Proximity effect in NiCu-based Josephson tunnel junctions

R. Latempa, L. Parlato, G. Peluso, G.P Pepe, A. Ruotolo, A. Barone, Alexandre Avraamovitch Golubov

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Abstract

We present experimental results concerning both the fabrication and the characterization of superconducting tunnel junctions based on Nb/NiCu superconductor/ferromagnet (S/F) bilayers. Josephson junctions have been characterized down to T=1.4 K in terms of current-voltage I-V characteristics, Josephson critical current vs magnetic field, role of external magnetic field. Proximity parameters of the bilayer, such as the coherence length and the exchange field energy of the F metal, have been estimated by means of a numerical deconvolution of the I-V data the electronic density of states on both sides of the S/F bilayer. 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 layer, respectively.
Original languageUndefined
Pages (from-to)133-136
JournalIEEE transactions on applied superconductivity
Volume15
Issue number2
DOIs
Publication statusPublished - 2005

Keywords

  • METIS-225025
  • IR-98004

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