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Journal of Low Temperature Physics

, Volume 151, Issue 1–2, pp 585–590 | Cite as

Current-Induced Critical State in NbN Thin-Film Structures

  • K. Il’in
  • M. Siegel
  • A. Engel
  • H. Bartolf
  • A. Schilling
  • A. Semenov
  • H.-W. Huebers
Article

Abstract

The temperature dependence of the critical current of NbN thin-film bridges was experimentally studied. At low temperatures we observed significant enhancement (up to two times at 4 K) of the critical current density over de-pinning value in the sub-micrometer wide bridges. This enhancement can be described by an increase of the edge barrier for penetration of magnetic vortices into narrow superconducting strips.

Keywords

Thin superconducting films Niobium nitride Critical current Magnetic vortex Edge barrier 

PACS

74.25.Sv 74.78.Na 

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References

  1. 1.
    K.K. Likharev, Rev. Mod. Phys. 51, 101 (1979) CrossRefADSGoogle Scholar
  2. 2.
    A. Engel, A. Semenov, H.-W. Hübers, K. Il’in, M. Siegel, Phys. C Supercond. Appl. 444(1–2), 12 (2006) ADSGoogle Scholar
  3. 3.
    K.S. Il’in, M. Siegel, J. Appl. Phys. 92, 361 (2002) CrossRefADSGoogle Scholar
  4. 4.
    A.D. Semenov, K. Il’in, M. Siegel, A. Smirnov, S. Pavlov, H. Richter, H.-W. Hübers, Supercond. Sci. Technol. 19, 1051 (2006) CrossRefADSGoogle Scholar
  5. 5.
    W.J. Skocpol, M.R. Beasley, M. Tinkham, J. Appl. Phys. 45, 4054 (1974) CrossRefADSGoogle Scholar
  6. 6.
    C.P. Bean, J.D. Livingston, Phys. Rev. Lett. 12, 14 (1964) CrossRefADSGoogle Scholar
  7. 7.
    A.A.B. Brojeny, J.R. Clem, Supercond. Sci. Technol. 18, 888 (2005) CrossRefADSGoogle Scholar
  8. 8.
    G. Stan, S.B. Field, J.M. Martinis, Phys. Rev. Lett. 92, 097003 (2004) CrossRefADSGoogle Scholar
  9. 9.
    A. Engel, A. Semenov, H.-W. Hübers, K. Il’in, M. Siegel, in New Frontiers in Superconductivity Research, ed. by B.P. Martins (NOVA Publishers, New York, 2006), Chap. 6, p. 153 Google Scholar

Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  • K. Il’in
    • 1
  • M. Siegel
    • 1
  • A. Engel
    • 2
  • H. Bartolf
    • 2
  • A. Schilling
    • 2
  • A. Semenov
    • 3
  • H.-W. Huebers
    • 3
  1. 1.Institute for Micro- and Nano-Electronic SystemsUniversity of KarlsruheKarlsruheGermany
  2. 2.Physics InstituteUniversity of ZurichZurichSwitzerland
  3. 3.DLR e.V. Institute of Planetary ResearchBerlin-AdlershofGermany

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