Method of using a ferromagnet material having a high permeability and saturation magnetization at low temperatures

Claim 1

Method of using a ferromagnet material having a high permeability and saturation magnetization to induce superconducting currents in a ring of superconductive material where the ferromagnet material has a lower transition temperature than the superconductive material, said method including the steps of: (A) placing a bar of a ferromagnet material in an annular ring of a superconductive material at a temperature above both the transition temperature of the ferromagnet material and the transition temperature of the superconductive material, (B) applying an axial magnetic field of sufficient strength to saturate the ferromagnet when the ferromagnet is cooled below its transition temperature, (C) cooling the ferromagnet to below its transition temperature without cooling the superconductive material so that the superconductive material does not become superconducting before the saturation of the ferromagnet, (D) cooling the superconductive material to below its transition temperature, (E) removing the ferromagnet and the applied field, and (F) allowing the system to warm to a convenient operating temperature which must be below the transition temperature of the superconductive material.