Iodometric determination of oxygen contents of the T1 single layer system and their relevance to superconductivity

S. Nakajima, M. Kikuchi, Y. Syono, T. Oku, K. Nagase, N. Kobayashi, D. Shindo, K. Hiraga

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    28 Citations (Scopus)

    Abstract

    The oxygen contents of oxygen-annealed T1 single layer systems were determined by iodometric titration. The oxygen contents, w, of T1Ba2Ca1-xYxCu2Ow increased with Y concentration, x, substituted for Ca. Oxygen vacancy, y, was estimated to be about. y=0.3 in oxygen-annealed T1Ba2Can-1CunO2n+3-y (n=2, 3, 4). The Cu valence of oxygen-annealed T1Ba2 Can-1CunO2n+3-y is calculated to be about 2.2+, if the hole is introduced only in the CuO2 pyramidal sheets. Square planar CuO2 planes of the T1 single layer system may not be active for superconductivity.

    Original languageEnglish
    Pages (from-to)89-94
    Number of pages6
    JournalPhysica C: Superconductivity and its applications
    Volume182
    Issue number1-3
    DOIs
    Publication statusPublished - 1991 Oct 20

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics
    • Energy Engineering and Power Technology
    • Electrical and Electronic Engineering

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