The relationship of oxygen content and Tc in Tl0.5Pb0.5Sr2CuO5±δ

M. H. Pan, M. Greenblatt

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Polycrystalline samples of pure Tl1-xPbxSr2CuO5± δ with 0.4 ≤ x ≤ 0.5 have been prepared. Samples of Tl0.5Pb0.5Sr2Cu05±δ which are quenched from ≈850°C to room temperature are tetragonal (P4/mmm) with a=3.736, c=9.022 A ̊ and bulk super-conducting with a Tconset ≈ 60 K. Samples of Tl0.5Pb0.5Sr2Cu05±δ quenched from 900°C into liquid nitrogen are semiconducting, which transform to a metallic state upon annealing in air at ≈500°C. Both the semiconducting and metallic phases form with tetragonal P4/mmm symmetry. Thermogravimetric analyses and X-ray data indicate that small variations in the oxygen content are responsible for the dramatic changes in the physical properties.

Original languageEnglish (US)
Pages (from-to)80-86
Number of pages7
JournalPhysica C: Superconductivity and its applications
Issue number1-3
StatePublished - May 15 1991

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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