Influence of chemical substituents on the superconductivity of the system Bi4Ca3Sr3Cu4Oy

E. V. Sampathkumaran, Naoshi Ikeda, K. Kohn, R. Vijayaraghavan

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Abstract

The effect of the partial replacement of Bi by Eu, Gd, K and Pb, and Cu by Ni, on the superconducting transition temperature (Tc) of Bi 4Ca3Sr3Cu4Oy (y=undetermined) is investigated by DC resistivity (R) and AC susceptibility ( chi ) measurements. Tc is not significantly altered by Eu and Gd substituents (Tc close to 65 K); however, K and Pb substituents tend to enhance the fraction of a phase superconducting around 110 K. Interestingly, for nickel specimens, Tc of a large fraction, as suggested by AC chi data, initially decreases to 40 K with increasing concentration of nickel, followed by an increase, whereas R data shows no appreciable variation of T c.

Original languageEnglish
Article number004
JournalJournal of Physics F: Metal Physics
Volume18
Issue number8
DOIs
Publication statusPublished - 1988
Externally publishedYes

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Superconductivity
Nickel
alternating current
superconductivity
nickel
Superconducting transition temperature
direct current
transition temperature
magnetic permeability
electrical resistivity

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Metals and Alloys

Cite this

Influence of chemical substituents on the superconductivity of the system Bi4Ca3Sr3Cu4Oy. / Sampathkumaran, E. V.; Ikeda, Naoshi; Kohn, K.; Vijayaraghavan, R.

In: Journal of Physics F: Metal Physics, Vol. 18, No. 8, 004, 1988.

Research output: Contribution to journalArticle

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