1. Proximity Effect in NiCu-Based Josephson Tunnel Junctions
- Author
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G. Peluso, Loredana Parlato, Alexandre Avraamovitch Golubov, Antonio Barone, Antonio Ruotolo, Giovanni Piero Pepe, R. Latempa, R., Latempa, Parlato, Loredana, Peluso, Giuseppe, Pepe, GIOVANNI PIERO, A., Ruotolo, A., Barone, A. A., Golubov, and Faculty of Science and Technology
- Subjects
Superconductivity ,Josephson effect ,Physics ,Condensed matter physics ,Bilayer ,METIS-225025 ,Condensed Matter::Mesoscopic Systems and Quantum Hall Effect ,Condensed Matter Physics ,Electronic, Optical and Magnetic Materials ,Pi Josephson junction ,Tunnel effect ,Tunnel junction ,Condensed Matter::Superconductivity ,IR-98004 ,Proximity effect (superconductivity) ,Superconducting tunnel junction ,Electrical and Electronic Engineering - 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.
- Published
- 2005
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