The critical magnetic fields of superconducting nanostructures based on Nb and Cu-Ni – alloy layers

Abstract

Based on studies of resistive transitions in ferromagnet/superconductor/ferromagnet samples Cu41Ni59/Nb/Cu41Ni59 it were investigated the thermodynamic fluctuations of the superconducting order parameter, the width of the critical region and the change of the Ginzburg-Levanyuk criterion; execute the theoretical calculation of the critical magnetic fields for the three-layered nanostructures of the ferromagnet-superconductor-ferromagnet and compare them with experimental data in three-layered nanostructures Cu41Ni59/Nb/Cu41Ni59

In frame of this work the main scientific and technical problem was resolved.