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Proceedings Paper

Josephson junctions with ferromagnetic materials
Author(s): M. Yu. Kupriyanov; A. A. Golubov; M. Siegel
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Paper Abstract

The current status of the material and interfaces aspects of the problem of SFS Josephson junction fabrication is reviewed and recommendations for selection of ferromagnetic materials are formulated. It is shown that additional pair braking mechanisms at SF interfaces, as well as spin flip and spin orbit scattering in the F films should be taking into account for the data interpretation. The results of theoretical studies of the influence of spin-flip and spin-orbit scattering on the oscillations of critical current with the thickness of the ferromagnetic layers are summarized and discussed. The form of the relation between supercurrent J and order parameters phase difference φ across a junction is analyzed. It is shown that the Josephson current across the structure has the sum of sinφ and sin2φ components and that two different physical mechanisms are responsible for the sign of sin2φ.

Paper Details

Date Published: 10 June 2006
PDF: 12 pages
Proc. SPIE 6260, Micro- and Nanoelectronics 2005, 62600S (10 June 2006); doi: 10.1117/12.681774
Show Author Affiliations
M. Yu. Kupriyanov, Moscow State Univ. (Russia)
A. A. Golubov, Univ. of Twente (Netherlands)
M. Siegel, Karlsruhe Univ. (Germany)

Published in SPIE Proceedings Vol. 6260:
Micro- and Nanoelectronics 2005
Kamil A. Valiev; Alexander A. Orlikovsky, Editor(s)

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