Niobium-germanium (Nb3Ge) is an intermetallic chemical compound of niobium (Nb) and germanium (Ge). 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.1
History
Nb3Ge was discovered to be a superconductor in 19732 and for 13 years (until the discovery in 1986 of the cuprate superconductors) it held the record as having the highest critical temperature.3
It has not been as widely used for superconductive applications as niobium–tin or niobium–titanium.
Related alloys
Niobium-germanium-aluminium has an upper critical field of about 10 teslas.4
References
References
- Oya, Gin-ichiro; E. J. Saur (1979). "Preparation of Nb3Ge films by chemical transport reaction and their critical properties". Journal of Low Temperature Physics. 34 (5–6): 569–583. Bibcode:1979JLTP...34..569O. doi:10.1007/BF00114941. S2CID 119846986.
- "Physics Today". American Institute of Physics. October 1973.
{{cite web}}: CS1 maint: deprecated archival service (link) - "Superconducting devices". TheFreeDictionary. Retrieved 2008-09-06.
- Sinha, P. K. (1987). Electromagnetic Suspension: Dynamics & Control. The Institution of Engineering and Technology. p. 290. ISBN 978-0-86341-063-5.