We consider a new class of composite superconducting films with embedded ma
gnetic nanorods (stripes). These nanomagnets can create a thermodynamically
stable, frozen, dense flux line network. We examine conditions under which
the magnetic nanorods (stripes) capture flux and discuss the phase diagram
of the frozen flux state. The ground state of this system contains spontan
eous current in violation with the time-reversal symmetry.