Li doping into the Pb substituted Bi-2212 phase by electrochemical method

Hirofumi Joko, Masashi Fujiwara, Makoto Nakanishi, Tatsuo Fujii, Jun Takada, Yoshihiro Kusano, Yasuo Takeda, Yasunori Ikeda, Mikio Takano, Yoshichika Bando

Research output: Contribution to journalArticle

Abstract

Effects of electrochemical Li-doping to the Pb-substituted Bi-2212 phase on its structural and superconducting properties were studied. Bi1.8Pb0.2Sr1.5Ca1.5Cu 2Oz was lithiated through an electrochemical method at constant applied potential at room temperature. In the electrochemically Li-doping samples, the original crystal symmetry, tetragonal structure, was maintained and any secondary phase was not formed. The amount of doped Li for Bi1.8Pb0.2Sr1.5Ca1.5Cu 2Oz was much lager than that for Bi2Sr1.5Ca1.5Cu2Oz at the same reaction periods. Analysed maximum Li content y for LiyBi1.8Pb0.2Sr1.5Ca 1.5Cu2Oz was found to be 0.53, which was remarkably high in comparison with y=0.37 for LiyBi2Sr1.5Ca1.5Cu2O z. The lattice parameters (a,c) of LiyBi1.8Pb0.2Sr1.5Ca 1.5Cu2Oz increased continuously in a similar trend to that of LiyBi2Sr1.5Ca1.5Cu2O z. Tc remains almost constant around 85K as the Li content y increased.

Original languageEnglish
Pages (from-to)792-796
Number of pages5
JournalFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume44
Issue number8
DOIs
Publication statusPublished - Aug 1997

Keywords

  • Electrochemical reaction
  • Lattice parameter
  • Li-doping
  • Pb-substituted 2212 phase
  • Tc

ASJC Scopus subject areas

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Metals and Alloys
  • Materials Chemistry

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