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VOLUME 74 | ISSUE 2 | PAGE 101
Critical temperature of superconductor/ferromagnet bilayers
Ya. V. Fominov+*, N. M. Chtchelkatchev+, A. A. Golubov*
+L. D. Landau Institute for Theoretical Physics RAS, 117940 Moscow, Russia
*Department of Applied Physics, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands


PACS: 74.50.+r, 74.80.Dm, 75.30.Et
Abstract
Superconductor/ferromagnet bilayers are known to exhibit nontrivial dependence of the critical temperature Tc on the thickness df of the ferromagnetic layer. We develop a general method for investigation of Tc as a function of the bilayer's parameters. It is shown that interference of quasiparticles makes Tc(df) a nonmonotonic function. The results are in good agreement with experiment. Our method also applies to multilayered structures.


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