Organic conductor/high-Tc superconductor bilayer structures

Marvin B. Clevenger, Christopher E. Jones, Steven G. Haupt, Jianai Zhao, John T. McDevitt

Research output: Contribution to journalConference article

Abstract

Electrochemical techniques are exploited to fabricate conductive polymer/high Tc superconductor bilayer structures. SCanning electron microscopy and electrochemical techniques are utilized to characterize the electrodeposition of polypyrrole layers grown onto YBa2Cu 3O7-(delta ) films. In such hybrid polymer/superconductor systems, it is found that when the polymer is oxidized to its conductive state, the transition temperatures (Tc) and critical currents (J c) of the underlying superconductor film are suppressed. Reversible modulation of the values of the transition temperatures of up to 50K are noted for these structures. Upon reduction of the conductive polymer layer back to its non-conductive form, both Tc and Jc are found to return to values close to those acquired for the underivatized YBa2Cu 3O7-(delta ) film. Moreover, measurements as a function of temperature of the polymer/superconductor interface resistance show dramatic decrease in this value at Tc. ALso, estimates of superconducting coherence lengths within the organic conductor samples suggest superconducting properties over macroscopically large distances within the organic materials can be expected. Collectively these results are consistent with the first observation of a conductive polymer proximity effect.

Original languageEnglish (US)
Pages (from-to)508-519
Number of pages12
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume2697
DOIs
StatePublished - 1996
EventOxide Superconductor Physics and Nano-Engineering II - San Jose, CA, United States
Duration: Jan 30 1996Jan 30 1996

Keywords

  • Conductive polymers
  • Proximity effect
  • Superconductor
  • YBaCu O

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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