Effect of heat treatment on the superconductivity of Pb-doped Bi-2212 system: Evidence for a possible phase segregation

Gaojie Xu, Zhiqiang Mao, Yuheng Zhang

Research output: Contribution to journalArticlepeer-review

Abstract

Samples of the Bi1.8Pb0.2Sr2CaCu2O 8-δ system with different oxygen concentrations were prepared by annealing the corresponding ceramic sample in various conditions. The normal-state properties were investigated by means of X-ray diffraction (XRD), resistivity, thermoelectric power (TEP), and specific heat. Analyses of these data demonstrate that a possible phase segregation exists in some samples, i.e., the Bi1.8Pb0.2Sr2CaCu2O 8-δ phase with lower carrier concentrations separates into oxygen-rich superconducting domains and oxygen-poor superconducting domains. The anomalous properties of the normal state are discussed in the paper.

Original languageEnglish (US)
Pages (from-to)259-263
Number of pages5
JournalJournal of Superconductivity
Volume11
Issue number2
DOIs
StatePublished - 1998

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Physics and Astronomy (miscellaneous)

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