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

Research output: Contribution to journalArticle

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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