The crystal structure and low-magnetic-field properties of the Pb- and Ba-doped Bi-Sr-Ca-Cu-O system

Mao Zhiqiang, Zeng Xinglin, Yang Li, Wang Yu, Wang Shunxi, Cao Leizhao, Chen Zhaojia, Fan Chenggao, Zhang Yuheng

Research output: Contribution to journalArticle

Abstract

The XRD analyses for the Bi-Pb-Sr-Ca-Ba-Cu-O system show that the addition of Ba ions is favourable to the formation of the higher-Tc phase (Tc>100 K), and TEM observations show that the partial substitution of Ba ions for Ca ions induces a change in the crystal microstructure of the higher-Tc phase (Tc>100 K); a new modulation mode with a wavelength of 43 AA appears in the electron diffraction pattern of the higher-Tc phase. The EDS results confirm that Ba ions really intercalate into the crystal of the 2:2:2:3 phase. The DC magnetization measurements show that the sample displays a much larger hysteresis than that of a general Pb-doped sample. In addition, a study on the influence of low DC magnetic fields on the real component chi ' and imaginary component chi " of the susceptibility for the Ba-doped sample shows that Tp is related to the applied field HDC and their relation can be fitted by (1-Tp/Tc) varies as H0.23 when H DC<140 G, and (1-Tp/Tc) varies as H 0.65 when HDC>140 G. These data can be excellently interpreted in terms of Bean's critical-state model.

Original languageEnglish (US)
Article number020
Pages (from-to)9481-9488
Number of pages8
JournalJournal of Physics: Condensed Matter
Volume3
Issue number47
DOIs
StatePublished - Dec 1 1991

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics

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    Zhiqiang, M., Xinglin, Z., Li, Y., Yu, W., Shunxi, W., Leizhao, C., Zhaojia, C., Chenggao, F., & Yuheng, Z. (1991). The crystal structure and low-magnetic-field properties of the Pb- and Ba-doped Bi-Sr-Ca-Cu-O system. Journal of Physics: Condensed Matter, 3(47), 9481-9488. [020]. https://doi.org/10.1088/0953-8984/3/47/020