Superconductor and process of manufacture

The process of producing a Type II superconducting alloy which is superconducting at a high magnetic field, comprising the steps of creating a composite characterized by a periodic arrangement of at least two transition metals so as to provide numerous interfaces between the different transition metals, the transition metals being selected from the elements niobium, titanium, zirconium, vanadium, hafnium, and tantalum, and alloys thereof which are not superconducting at said field, the combination of transition metals being such that one of the metals will serve as a second phase when the layers are subjected to temperatures which would produce a two-phase equilibrium state from a solid solution alloy of said transition metals, mechanically reducing and heating the composite to cause interdiffusion of the transition metals to form ductile superconducting alloy zones at the interfaces of the transition metals, there being sufficient heat treatment in the region where two phases exist in the phase diagram to form two phases, one phase being the desired superconducting Type II alloy and the other phase being the non superconducting normal metal or alloy, limiting the temperature of heat treatment to the two-phase region, and thereafter mechanically reducing the composite so that the two zones are each less than about 1000 nm in thickness.