J. Phys. IV France
Volume 131, December 2005
Page(s) 213 - 216
Publié en ligne 18 janvier 2006
International Workshop on Electronic Crystals
S. Brazovskii, P. Monceau and N. Kirova
J. Phys. IV France 131 (2005) 213-216

DOI: 10.1051/jp4:2005131052

Non-uniform superconductivity in S/F nanostructures

A. Buzdin

Institut Universitaire de France and University Bordeaux I, CPMOH, UMR 5798, 33405 Talence, France

A strong exchange field acting on the Cooper pairs in the ferromagnetic (F) metal leads to the damping oscillatory behaviour of the superconducting order parameter inside the F layer. In consequence the electron density of state and spin polarization decay non-monotonously in S/F proximity structures. We review the influence of these effects on the properties of S-F multilayers where the critical temperature and Josephson current depend in an oscillatory manner on the exchange field and thickness of ferromagnetic metal. These oscillations are related with the transition into the state where the phase of superconducting order parameter is opposite on the adjacent superconducting layers. We briefly discuss the properties of the Josephson junction at this transition.

© EDP Sciences 2005