Low Temperature Physics: 32, 809 (2006); https://doi.org/10.1063/1.2219502 (10 pages)
Физика Низких Температур: Том 32, Выпуск 8-9 (Август 2006), c. 1065-1077 ( к оглавлению , назад )
Adjustment of superconductivity and ferromagnetism in the few-layered ferromagnet-superconductor nanostructures
Y.A. Izyumov1, M.G. Khusainov2,3,4, Y.N. Proshin2,3
1Institute of Metal Physics, Ural Division of RAS, Ekaterinburg 620219, Russia
2Kazan State University, Kazan 420008, Russia
3Max-Planck-Institute for the Physics of Complex Systems, Dresden 01871, Germany
4«Vostok» branch, Kazan State Tupolev Technical University, Chistopol’ 422981, Russia
Received March 15, 2006, revised May 4, 2006
The phase diagrams of the few-layered nanosystems consisting of dirty superconducting (S) and
ferromagnetic (F) metals are investigated within the framework of the modern theory of the proximity
effect taking into account the boundary conditions. The F/S tetralayer and pentalayer are shown to have considerably richer physics than the F/S bi- and trilayer (due to the interplay between the 0 and p phase superconductivity and the 0 and p phase magnetism and nonequivalence of
layers) and even the F/S superlattices. It is proven that these systems can have different critical
temperatures and fields for different S layers. This predicted decoupled superconductivity is found to manifest itself in its most striking way for F/S tetralayer. It is shown that F/S/F'/S' tetralayer is the most perspective candidate for use in superconducting spin nanoelectronics.
Ключевые слова: proximity effect, superconductivity, ferromagnetism, multilayers, critical temperature.