Influence of chemical substituents on the superconductivity of the system Bi4Ca3Sr3Cu4Oy

E. V. Sampathkumaran; N. Ikeda; K. Kohn; R. Vijayaraghavan

doi:10.1088/0305-4608/18/8/004

Influence of chemical substituents on the superconductivity of the system Bi₄Ca₃Sr₃Cu₄O_y

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

Research output: Contribution to journal › Article › peer-review

Abstract

The effect of the partial replacement of Bi by Eu, Gd, K and Pb, and Cu by Ni, on the superconducting transition temperature (T_c) of Bi ₄Ca₃Sr₃Cu₄O_y (y=undetermined) is investigated by DC resistivity (R) and AC susceptibility ( chi ) measurements. T_c is not significantly altered by Eu and Gd substituents (T_c 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, T_c 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 language	English
Article number	004
Pages (from-to)	L163-L167
Journal	Journal of Physics F: Metal Physics
Volume	18
Issue number	8
DOIs	https://doi.org/10.1088/0305-4608/18/8/004
Publication status	Published - Dec 1 1988
Externally published	Yes

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy (miscellaneous)
Metals and Alloys

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10.1088/0305-4608/18/8/004

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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.",

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AU - Sampathkumaran, E. V.

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AU - Kohn, K.

AU - Vijayaraghavan, R.

PY - 1988/12/1

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N2 - 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.

AB - 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.

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Influence of chemical substituents on the superconductivity of the system Bi₄Ca₃Sr₃Cu₄O_y

Abstract

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