XPS study on the preferential site occupations of Bi, Sr and Ca ions in Bi2Sr2CaCu2O8+d superconductors prepared by LPE method

K. Wakamatsu, Y. Oikawa, H. Enomoto, J. S. Shin, Etsuo Uchida, H. Ozaki

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    Abstract

    XPS measurements were performed on the Bi2Sr2CaCu2O8+d system prepared by the LPE method using melts with compositions Bi:Sr:Ca:Cu = (2 - x) : 2 : (1 + x) : 2 for 0 ≤ x ≤ 0.2. The peak decompositions of Sr3d and Ca2p XPS spectra, together with the EPMA results, elucidated the occupancies of Bi, Sr and Ca atoms on the BiO-, SrO- and Ca-layers. The x dependences of the lattice parameter c and the superconducting critical temperature Tc are explained by the changes of the excess oxygens in the BiO layer.

    Original languageEnglish
    Pages (from-to)687-688
    Number of pages2
    JournalPhysica C: Superconductivity and its Applications
    Volume235-240
    Issue numberPART 1
    DOIs
    Publication statusPublished - 1994

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    ASJC Scopus subject areas

    • Condensed Matter Physics

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