Observation of the Epitaxial Satellite Phase in the Superconducting RuSr2Eu1.5Ce0.5Cu2O10 Ceramic Samples

V. V. Petrykin, M. Osada, M. Kakihana, Y. Tanaka, H. Yasuoka, Y. Ueki, M. Abe

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    Abstract

    We have compared nonsuperconducting and superconducting ceramic samples of RuSr2Eu1.5Ce0.5Cu2O10 prepared by a polymerizable complex method using Raman spectroscopy and electron diffraction. The superconductivity in these ruthenocuprate samples was associated with ruthenium deficiency. It turned out that superconducting samples contain an epitaxial satellite phase having lattice parameters of a = 3.8407Å, c = 11.417Å (a/c ≈ 3), whereas Raman spectra revealed the presence of carbonate groups, which coordinate metal ions in a manner similar to that in the superconducting carboxycuprates. Therefore, we speculate that the satellite phase is EuSr2Cu3-x(CO 3)xO7+z doped with Ru into Cu chain site and it might be responsible for superconductivity. The intergrowth of such a phase was confirmed by HREM.

    Original languageEnglish
    Pages (from-to)4417-4423
    Number of pages7
    JournalChemistry of Materials
    Volume15
    Issue number23
    DOIs
    Publication statusPublished - 2003 Nov 18

    ASJC Scopus subject areas

    • Chemistry(all)
    • Chemical Engineering(all)
    • Materials Chemistry

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