Superconductivity and low-temperature structural phase transition in La1.98-xCe0.02BaxCuO4

Yoji Koike, T. Kawaguchi, N. Watanabe, Takashi Noji, Y. Saito

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41 Citations (Scopus)

Abstract

Effects of the partial substitution of Ce for La on the superconductivity and the low-temperature structural phase transition have been investigated in La2-xBaxCuO4. The local minimum of Tc as a function of Ba concentration x, appearing near x = 0.125 for La2-xBaxCuO4, clearly shifts to x = 0.145 for La1.98-xCe0.02BaxCuO4. The range of x, where a resistance minimum relating to the low-temperature structural phase transition appears, shifts to that of larger x values, too. These suggest that the low-temperature structural phase transition around x = 0.125 in La2-xBaxCuO4 is due to the optimum hole concentration of 0.125 per Cu atom rather than plausible atomic ordering of La and Ba.

Original languageEnglish
Pages (from-to)155-158
Number of pages4
JournalSolid State Communications
Volume79
Issue number2
DOIs
Publication statusPublished - 1991 Jan 1

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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