Effects of the Cu-site substitution on the anomalous x dependence of Tc in La2-xBaxCuO4

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

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25 Citations (Scopus)

Abstract

Effects of the partial substitution of Ni, Zn and Ga for Cu on the anomalous x dependence of Tc and the resistance anomaly around 60 K have been investigated in La2-xBaxCuO4. Tc decreases by the substitution in comparison with non-subsituted samples in almost all compositions of x except compositions near x = 0.125. For 1% Ga-substituted samples for Cu, the local minimum of Tc as a function of x, appearing near x = 0.125 for non-substituted samples, clearly shifts to x ≈ 0.135. This suggests that the low-temperature structural phase transition around x = 0.125 in La2-xBaxCuO4 is primarily due to the optimum hole concentration of 0.125 per Cu atom rather than the atomic ordering of La and Ba. The resistance anomaly near 60 K does not change clearly by the substitution.

Original languageEnglish
Pages (from-to)511-514
Number of pages4
JournalSolid State Communications
Volume78
Issue number6
DOIs
Publication statusPublished - 1991 Jan 1

ASJC Scopus subject areas

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

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