High-pressure oxygen-induced bulk superconductivity in 1222 structure Tl-Pb-Sr-Eu(Ce)-Cu-O

Z. Iqbal, A. P.B. Sinha, D. E. Morris, J. C. Barry, G. J. Auchterlonie, B. L. Ramakrishna

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A primarily single phase compound of composition (Tl0.5Pb 0.5)Sr2(Eu2-xCex)Cu 2O9 (where x ranges from ≪0.1 to 0.17) has been synthesized in the so-called 1222 structure. Bulk superconductivity near 40 K is induced via oxygen doping in 100 bar of oxygen at 550°C. The material has been structurally characterized by diffraction and high-resolution lattice imaging techniques. The lattice images reveal the presence of some intergrowths of a 1212 structure nonsuperconducting (Tl0.5Pb0.5)Sr 2EuCu2O7 phase in the bulk 1222 structure of the parent compound and indications of periodicity that suggest the possible existence of a new, composite structure 2434 phase.

Original languageEnglish (US)
Pages (from-to)2234-2237
Number of pages4
JournalJournal of Applied Physics
Issue number4
StatePublished - 1991
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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