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Current-induced voltage oscillations in superconducting Y 1 Ba 2 Cu 3 O 7-δ

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  • K. Kiliç
  • A. Kiliç
  • A. Altınkök
  • H. Yetiş
  • O. Çetin

Abstract

We investigated influence of bidirectional square wave current with long periods and dc current on the evolution of the voltage-time (V - t) curves in superconducting polycrystalline bulk Y 1 Ba 2 Cu 3 O 7-δ (YBCO) material at the temperatures near the critical temperature. In a well-defined range of amplitudes and periods of driving current, and temperatures, novel type of non-linear dynamic responses was observed by means of the V-t curves. It was seen that such a non-linear response to bidirectional square wave current sometimes reflects itself as regular sinusoidal-like voltage oscillations. The sinusoidal-like and non-sinusoidal oscillations were discussed mainly in terms of the dynamic competition between pinning and depinning and significant relaxation effects which appear in this competing process. The density fluctuations associated with the current induced self-magnetic flux (SMF) lines and semi-elastic coupling of SMF lines with the pinning centers were also considered as possible physical mechanisms in the interpretation of the experimental results. Copyright EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2005

Suggested Citation

  • K. Kiliç & A. Kiliç & A. Altınkök & H. Yetiş & O. Çetin, 2005. "Current-induced voltage oscillations in superconducting Y 1 Ba 2 Cu 3 O 7-δ," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 48(2), pages 189-197, November.
    • Handle: RePEc:spr:eurphb:v:48:y:2005:i:2:p:189-197
    DOI: 10.1140/epjb/e2005-00395-8
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