Magnetic Shielding

At low frequencies the magnetic field is due either to the electric current flowing in conductors of various geometries or to the magnetization of surrounding ferromagnetic materials. The classical strategy for reducing quasi‐static magnetic fields in a specific region consists in inserting a shield of appropriate material, whose properties are used to alter the spatial distribution of the magnetic field emitted by the source. The shield in fact causes a change in the behavior of the field, diverting the lines of the magnetic induction away from the shielded region.