Effect of bismuth substitution on liquid formation in thallium-based superconductors

M. T. Lanagan, J. Hu, M. Foley, P. Kostic, M. R. Hagen, D. J. Miller, K. C. Goretta

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Abstract

The role of bismuth substitution on the phase development and melting behavior of Tl1.1-xBixBa0.4Sr1.6Ca 2Cu3O9-δ was studied. The substitution limit was x=0.25, and a low-melting liquid was formed when the limit was exceeded. The barium content of the superconductor decreased with increasing bismuth substitution, which coincided with BaBiO3 formation. Magnetization and X-ray diffraction data revealed that the single-layer Tl compound coexists with BaBiO3 up to x=0.8. For selected compositions, superconductor wire was fabricated by a powder-in-tube process. The critical current density was measured and correlated with the microstructure.

Original languageEnglish (US)
Pages (from-to)387-392
Number of pages6
JournalPhysica C: Superconductivity and its applications
Volume256
Issue number3-4
DOIs
StatePublished - Jan 10 1996

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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