Physics:Niobium–germanium
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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 1973[2] 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
- ↑ 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. doi:10.1007/BF00114941. Bibcode: 1979JLTP...34..569O. https://dx.doi.org/10.1007%2FBF00114941.
- ↑ "Physics Today". American Institute of Physics. October 1973. http://www.physicstoday.org/resource/1/phtoad/v26/i10/p17_s2?isAuthorized=no.
- ↑ "Superconducting devices". TheFreeDictionary. http://encyclopedia2.thefreedictionary.com/Superconducting+devices. Retrieved 2008-09-06.
- ↑ Sinha, P. K. (1987). Electromagnetic Suspension: Dynamics & Control. The Institution of Engineering and Technology. pp. 290. ISBN 978-0-86341-063-5. https://books.google.com/books?id=DRdtKenSW1UC&q=niobium-germanium+superconductor&pg=PA9.
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