Superconductivity controlled by the magnetic state of ferromagnetic   nanoparticles
  Novel hybrid superconductor/ferromagnetic particles structures are presented. Arrays of Co submicron particles were fabricated on overlap, edge type Josephson junctions and on a narrow Nb microbridge by means of high-resolution e-beam lithography.We observed a strong dependence between the magnetic state of the particles and the field-dependent critical $I_c(H)$ of these structures. 
A.A. Fraerman, B.A. Gribkov, S.A. Gusev, E. Ilichev, A.Yu. Klimov,   Yu.N. Nozdrin, G.L. Pakhomov, V.V. Rogov, R. Stolz and ...