Niobium–germanium: Difference between revisions
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It is a [[superconductor]] with a [[critical temperature#Superconductivity|critical temperature]] of 23.2 [[kelvin]]s (K). |
It is a [[superconductor]] with a [[critical temperature#Superconductivity|critical temperature]] of 23.2 [[kelvin]]s (K). |
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Spluttered films have been reported to have an [[upper critical field]] of 37 Tesla at 4.2 K<ref> |
Spluttered films have been reported to have an [[upper critical field]] of 37 Tesla at 4.2 K<ref>{{cite journal |
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| title = Preparation of Nb<sub>3</sub>Ge films by chemical transport reaction and their critical properties |
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| journal = Journal of Low Temperature Physics |
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| volume = 34 |
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| issue = 5–6 |
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| year = 1979 |
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| doi = 10.1007/BF00114941 |
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| pages = 569–583 |
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| url =http://www.springerlink.com/content/vxl533x085p02128/fulltext.pdf?page=1}}</ref>. |
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==History== |
==History== |
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Nb<sub>3</sub>Ge was discovered to be a superconductor in 1971 <ref>http://www.abdn.ac.uk/physics/case/99/history.html</ref> and for 15 years (until the discovery in 1986 of the [[cuprate]] superconductors) it held the record as having the highest critical temperature <ref>http://encyclopedia2.thefreedictionary.com/Superconducting+devices |
Nb<sub>3</sub>Ge was discovered to be a superconductor in 1971 <ref>{{cite web |
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| url = http://www.abdn.ac.uk/physics/case/99/history.html |
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| title = The History of Superconductors |
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| date = 1999-12-13 |
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| accessdate = 2008-09-06 |
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| publisher = University of Aberdeen}} </ref> and for 15 years (until the discovery in 1986 of the [[cuprate]] superconductors) it held the record as having the highest critical temperature <ref>{{cite web |
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| url = http://encyclopedia2.thefreedictionary.com/Superconducting+devices |
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| publisher = TheFreeDictionary |
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| accessdate = 2008-09-06 |
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| title = Superconducting devices}}</ref>. |
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It has not been as widely used for superconductive applications as [[niobium-tin]] or [[niobium-titanium]]. |
It has not been as widely used for superconductive applications as [[niobium-tin]] or [[niobium-titanium]]. |
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==Related alloys== |
==Related alloys== |
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Niobium-germanium-aluminium has an [[upper critical field]] of about 10 Tesla<ref> |
Niobium-germanium-aluminium has an [[upper critical field]] of about 10 Tesla<ref>{{cite book |
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| title = Electromagnetic Suspension: Dynamics & Control |
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| first =P. K. |
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| last = Sinha |
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| publisher = The Institution of Engineering and Technology |
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| year = 1987 |
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| isbn = 9780863410635 |
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| pages =290 |
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| url = http://books.google.co.uk/books?id=DRdtKenSW1UC&pg=PA9&lpg=PA9&dq=niobium-germanium+superconductor&source=web&ots=rqDlTaB3Xr&sig=TsTB9GHFjY_pnd7Nbdc9v5nqfIA&hl=en&sa=X&oi=book_result&resnum=8&ct=result#PPA9,M1}}</ref>. |
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{{stub}} |
{{stub}} |
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Revision as of 16:43, 7 September 2008
Niobium-germanium (Nb3Ge) is a metallic chemical compound of niobium (Nb) and Germanium (Ge). It has A15 phase structure.
It is a superconductor with a critical temperature of 23.2 kelvins (K).
Spluttered films have been reported to have an upper critical field of 37 Tesla at 4.2 K[1].
History
Nb3Ge was discovered to be a superconductor in 1971 [2] and for 15 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 Tesla[4].
References
- ^ "Preparation of Nb3Ge films by chemical transport reaction and their critical properties" (PDF). Journal of Low Temperature Physics. 34 (5–6): 569–583. 1979. doi:10.1007/BF00114941.
- ^ "The History of Superconductors". University of Aberdeen. 1999-12-13. Retrieved 2008-09-06.
- ^ "Superconducting devices". TheFreeDictionary. Retrieved 2008-09-06.
- ^ Sinha, P. K. (1987). Electromagnetic Suspension: Dynamics & Control. The Institution of Engineering and Technology. p. 290. ISBN 9780863410635.