Effect of the variation of the exchange energy on the superconducting critical temperature of S/F/S trilayers
Belarus State University of Informatics and RadioElectronics, P. Browka 6, 220013 Minsk, Belarus
2 Kamerlingh Onnes Laboratory, Leiden University, P.O. Box 9504, 2300 RA Leiden, The Netherlands
3 CNR-SPIN Salerno and Dipartimento di Fisica “E.R. Caianiello”, Università degli Studi di Salerno, Fisciano (Sa) 84084, Italy
Corresponding author: a email@example.com
Published online: 30 March 2011
The effect of the exchange energy variation in weakly ferromagnetic alloys on the superconducting resistive transition of superconductor/ferromagnet/superconductor (S/F/S) trilayers is studied. Critical temperature, Tc, and resistive transitions versus the F-layer thickness, dF, have been analyzed in Nb/Cu0.41Ni0.59/Nb and Nb/Pd0.81Ni0.19/Nb trilayers. We show that Tc(dF) dependence is sensitive to magnetic inhomogeneities in the F-layer for values of dF corresponding to thickness range where the π-superconducting state is established.
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2011