Effect of the variation of the exchange energy on the superconducting critical temperature of S/F/S trilayers

V. N. Kushnir, S. L. Prischepa, J. Aarts, C. Bell, C. Cirillo and C. Attanasio ()

The European Physical Journal B: Condensed Matter and Complex Systems, 2011, vol. 80, issue 4, 445-449

Abstract: 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, T c , and resistive transitions versus the F-layer thickness, d F , have been analyzed in Nb/Cu 0.41 Ni 0.59 /Nb and Nb/Pd 0.81 Ni 0.19 /Nb trilayers. We show that T c (d F ) dependence is sensitive to magnetic inhomogeneities in the F-layer for values of d F corresponding to thickness range where the π-superconducting state is established. Copyright EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2011

Date: 2011
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DOI: 10.1140/epjb/e2011-20027-0

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