Niobium–germanium
Niobium-germanium is an intermetallic chemical compound of niobium and germanium. It has A15 phase structure.
It is a superconductor with a critical temperature of 23.2 K.
Sputtered films have been reported to have an upper critical field of 37 teslas at 4.2 K.
History
Nb3Ge was discovered to be a superconductor in 1973 and for 13 years it held the record as having the highest critical temperature.It has not been as widely used for superconductive applications as niobium–tin or niobium–titanium.