Inversion of the proximity effect in hybrid ferromagnet-superconductor-ferromagnet structures
Condensed Matter Group Theory, CPMOH, Université Bordeaux I, CNRS-UMR 5798
33405 Talence, France
Accepted: 3 September 2003
We propose an exactly solvable model to describe the properties of atomic thickness hybrid ferromagnet-superconductor-ferromagnet (F/S/F) structures. We show that the superconducting critical temperature is always higher for antiparallel orientation of the ferromagnetic moments. However, at low temperature the superconducting gap occurs to be larger for parallel orientation of the ferromagnetic moments. This leads to a peculiar temperature dependence of the proximity effect in (F/S/F) structures.
PACS: 74.50.+r – Tunneling phenomena; point contacts, weak links, Josephson effects / 74.78.Fk – Multilayers, superlattices, heterostructures
© EDP Sciences, 2003