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Super-conducting niobium films produced by means of UHV arc

  • J. Langner
  • M. J. Sadowski
  • K. Czaus
  • R. Mirowski
  • J. Witkowski
  • L. Catàni
  • A. Cianchi
  • R. Russo
  • S. Tazzari
  • F. Tazzioli
  • D. Proch
  • N. N. Koval
  • Y. H. Akhmadeev
Plasma Technology

Abstract

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.

PACS

52.77.Fv 

Key words

vacuum arc arc superconductivity thin films 

References

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    J. J. Langner:TESLA Report 2000-15. Ed.: D. Proch., DESY 2000.Google Scholar
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    R. R. Russo et al.: Proc. X Workshop on RF superconductivity, Tsukuba 2001, KEK Proc. 2003-2, p. 4.Google Scholar
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    C. Benvenuti et al.: Physica C351 (2001) 421.CrossRefADSGoogle Scholar
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    S. Tazzari et. al.: Proc. XI Worshop on RF Superconductivity, Travemunde 2003, in print.Google Scholar
  5. [5]
    G. Mesyats:Ectons in a vacuum discharge: breakdown, the spark, and the are: Nauka, Moscow 2000 (in Russian).Google Scholar

Copyright information

© Springer 2004

Authors and Affiliations

  • J. Langner
    • 1
  • M. J. Sadowski
    • 1
  • K. Czaus
    • 1
  • R. Mirowski
    • 1
  • J. Witkowski
    • 1
  • L. Catàni
    • 2
  • A. Cianchi
    • 2
  • R. Russo
    • 2
  • S. Tazzari
    • 2
  • F. Tazzioli
    • 3
  • D. Proch
    • 4
  • N. N. Koval
    • 5
  • Y. H. Akhmadeev
    • 5
  1. 1.The Andrzej Soltan Institute for Nuclear Studies (IPJ)Otwock-SwierkPoland
  2. 2.University Tor Vergata and INFN-Roma2RomaItaly
  3. 3.Laboratori Nazionali dellOINFNFrascatiItaly
  4. 4.DESYHamburgGermany
  5. 5.HCEITomskRussia

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