2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/97358Superconductor/ferromagnet bilayers are known to exhibit nontrivial dependence of the critical temperature T_c on the thickness d_f of the ferromagnetic layer. We develop a general method for investigation of T_c as a function of the bilayer's parameters. It is shown that interference of quasiparticles makes T_c(d_f) a nonmonotonic function. The results are in good agreement with experiment. Our method also applies to multilayered structures.4 pages, 2 EPS figures; the style file jetpl.cls is included. Version 2: typos correctedSuperconductivityMesoscale and Nanoscale Physicstext