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Structural Anomalies Study of 1223 Hg(Tl)-Ba-Ca-Cu-O Superconductors in the Temperature Range 100-300 K

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Author(s)

S Titova, I Bryntse, John Thomas Sirr Irvine, B Mitchell, V Balakirev

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Abstract

The crystal structure of Hg-based 1223 phases, Hg1-xTlxBa2Ca2Cu3O8+delta, with different oxygen content and Hg/Tl substitution having critical temperature from 114 to 133 K has been investigated by the X-ray powder diffraction technique over the temperature range from room temperature to 100 K. Rietveld analysis results indicate the presence of two different structure anomalies at temperatures 138 and 165 K, respectively. The changes in lattice parameters, fractional coordinates, and individual atom thermal parameters near the observed anomalies are discussed.

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Original languageEnglish
Pages (from-to)471-480
Number of pages9
JournalJournal of Superconductivity
Volume11
Publication statusPublished - Aug 1998

    Research areas

  • crystal structure, X-ray diffraction, Rietveld refinement, NEUTRON POWDER DIFFRACTION, HGBA2CA2CU3O8+DELTA, INSTABILITY

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