1202.1193 (J. Kehrle et al.)

Critical Temperature Oscillations and Reentrant Superconductivity due to
the FFLO like State in F/S/F Trilayers    [PDF]

J. Kehrle, V. I. Zdravkov, G. Obermeier, J. Garcia-Garcia, A. Ullrich, C. Mueller, R. Morari, A. S. Sidorenko, S. Horn, L. R. Tagirov, R. Tidecks

Ferromagnet/Superconductor/Ferromagnet (F/S/F) trilayers, in which the
establishing of a Fulde-Ferrell Larkin-Ovchinnikov (FFLO) like state leads to
interference effects of the superconducting pairing wave function, form the
core of the superconducting spin valve. The realization of strong critical
temperature oscillations in such trilayers, as a function of the ferromagnetic
layer thicknesses or, even more efficient, reentrant superconductivity, are the
key condition to obtain a large spin valve effect, i.e. a large shift in the
critical temperature. Both phenomena have been realized experimentally in the
Cu 41 Ni 59 /Nb/Cu 41 Ni 59 trilayers investigated in the present work.

View original: http://arxiv.org/abs/1202.1193