Cloaking magnetic fields

Recent advances like transformation optics have opened new possibilities of controlling electromagnetic fields, including cloaking devices that may render an object invisible to incident electromagnetic radiation. These cloaks have been theoretically presented but their practical implementation in microwaves, infrared or even visible light are actually not exact cloaks but only reduced versions (e. g. with only reduced scattering and some shadow). Here we present how in the case of static magnetic fields one can design an exact cloak using simply a superconductor-ferromagnetic bilayer, which makes it a unique case of an exact and feasible cloak. An experimental realization of the magnetic cloak is presented.