Nonuniform superconducting phases in a layered ferromagnetic superconductor
Université Bordeaux 1, CPMOH UMR-CNRS 5798 - F-33405 Talence Cedex, France
2 CEA Grenoble, DRFMC/SPSMS/LCP - F-38054 Grenoble Cedex 9, France
Accepted: 28 February 2002
We determine the phase diagram of the ferromagnetic (F)/superconducting (S) atomic superlattice with arbitrary coupling between the layers. The exchange field acting on F layers may induce different kinds of modulated superconducting phases with either in-plane modulation or a phase shift between adjacent S layers. When the exchange field is increased, the re-entrance of the superconductivity emerges and the “ phase” where the superconducting order parameter changes its sign in successive S layers is realized.
PACS: 74.80.Dm – Superconducting layer structures: superlattices, heterojunctions, and multilayers / 74.70.Pq – Ruthenates
© EDP Sciences, 2002