The high-Tc phase with a new modulation mode in the Bi, Pb-Sr-Ca-Cu-O system

Yasunori Ikeda, Mikio Takano, Zenji Hiroi, Kiichi Oda, Hitoshi Kitaguchi, Jun Takada, Yoshinari Miura, Yasuo Takeda, Osamu Yamamoto, Hiromasa Mazaki

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87 Citations (Scopus)


The preparation and characterization of Bi1.73Pb0.35Sr1.89Ca1.86Cu3O9.91, a lead-rich high-Tc phase, were studied (Tc(ρ=0)=105 K). This compound crystallized in a pseudotetragonal structure with at=0.541 nm and ct=3.709 nm, while a unique one-dimensional modulation with a wavelength of 4.7 nm (≃8.7a) was found along the b axis using transmission electron microscopy. Such a lead-rich phase and a lead-free (or very poor) phase crystallizing in the well-known modulated structure (2.7 nm≃5a) were intergrown at intermediate compositions, such as Pb/Bi=1/9. Effects of annealing under different oxygen pressures were studied.

Original languageEnglish
Pages (from-to)L2067-L2070
JournalJapanese Journal of Applied Physics
Issue number11 A
Publication statusPublished - Nov 1988


  • Ac susceptibility
  • Annealing effects
  • Bi
  • High-T (105 K) superconductor
  • Pb-Sr-Ca-Cu-0 system
  • Structural modulation

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)


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