Sampathkumaran, E. V. ; Ikeda, N. ; Kohn, K. ; Vijayaraghavan, R. (1988) Influence of chemical substituents on the superconductivity of the system Bi4Ca3Sr3Cu4Oy Journal of Physics F - Metal Physics, 18 (8). L163-L167. ISSN 0305-4608
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Official URL: http://iopscience.iop.org/0305-4608/18/8/004
Related URL: http://dx.doi.org/10.1088/0305-4608/18/8/004
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 Bi4Ca3Sr3Cu4Oy (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 Tc.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Institute of Physics. |
| ID Code: | 47280 |
| Deposited On: | 08 Jul 2011 12:59 |
| Last Modified: | 08 Jul 2011 12:59 |
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