Super-conducting niobium films produced by means of UHV arc
- 45 Downloads
The paper shows that high-quality super-conducting Nb films can be deposited by means of arc discharges under ultra-high vacuum conditions. The critical temperatureT c of Nb-films obtained with a planar cathodic arc Ultra High Vacuum (UHV) system, is very close to that of pure bulk niobiumT c=9.26 K and the transition to super-conducting state is very narrow. The films have higher Residual Resistivity Ratio (RRR) values (up to 80) and larger grain sizes, as compared with sputtered Nb-films deposited at the same temperature.
Key wordsvacuum arc arc superconductivity thin films
- J. J. Langner:TESLA Report 2000-15. Ed.: D. Proch., DESY 2000.Google Scholar
- R. R. Russo et al.: Proc. X Workshop on RF superconductivity, Tsukuba 2001, KEK Proc. 2003-2, p. 4.Google Scholar
- S. Tazzari et. al.: Proc. XI Worshop on RF Superconductivity, Travemunde 2003, in print.Google Scholar
- G. Mesyats:Ectons in a vacuum discharge: breakdown, the spark, and the are: Nauka, Moscow 2000 (in Russian).Google Scholar