Europhys. Lett, 48 (6), pp. 686-691 (1999)
Spin-orientation-dependent superconductivity in F/S/F structures
A. I. Buzdin, A. V. Vedyayev and N. V. Ryzhanova(*)
Centre de Physique Théorique et de Modélisation, Université Bordeaux 1
CNRS-URA 1537, F-33405 Talence Cedex, France
(received 20 April 1999; accepted in final form 13 October 1999)
PACS. 74.80Dm - Superconducting layer structures: superlattices, heterojunctions, and multilayers.
PACS. 74.50 - Proximity effects, weak links, tunneling phenomena, and Josephson effects.
A new proximity interferential effect is predicted for ferromagnet-superconductor-ferromagnet (F/S/F) systems. When the superconducting layer thickness is smaller or of the order of the superconducting coherence length, its critical temperature and other superconducting characteristics strongly depend on the mutual orientation of the magnetization in F layers. Such a behaviour may result in the fabrication of the so-called spin-valve sandwiches revealing huge magnetoresistance.
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