The study and formation of the antiferromagnetic insulators Bi2(Gd1-xCax)ySr2Cu2Oδ

Y. Y. Xue, P. H. Hor, Y. Y. Sun, Z. J. Huang, L. Gao, R. L. Meng, C. W. Chu, J. C. Ho, C. Y. Wu

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Abstract

We have studied the non-superconducting compounds Bi2(Gd1-xCax)ySr2Cu2O7 for x≤0.5 and y=0.8 or 1, structurally, electrically, magnetically and calorimetrically. Single phase antiferromagnets were found for x<0.4 and y∼0.8 only, with a maximum Néel temperature of 1.6 K for x = 0. Rietveld refinements of the X-ray diffraction data suggested that the (Bi-O) double layers act as a charge reservoir for the superconducting Bi-Ca-Sr-Cu-O (BCSCO) system. The results will be discussed with respect to the formation of the various homologous phases and the role of Ca-layers in the occurrence of superconductivity in BCSCO.

Original languageEnglish
Pages (from-to)211-216
Number of pages6
JournalPhysica C: Superconductivity and its applications
Volume158
Issue number1-2
DOIs
Publication statusPublished - 1989 Apr 1

All Science Journal Classification (ASJC) codes

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

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