An Investigation of the Transformation from Bi2Sr2CaCu2O8to Bi2Sr2Ca2Cu3O10

The phase stabilization of the (Bi1.6+yPb0.4)Sr2−xCa2+xCu3Ozsystem has been studied in the composition ranges 0≤x≤0.25 and 0≤y≤0.4 by X-ray powder diffraction, magnetic susceptibility, and electrical resistivity measurements. The transformation from Bi2Sr2CaCu2O8to Bi2Sr2Ca2Cu3O10is a slow process a...

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Bibliographic Details
Published in:Journal of solid state chemistry 1998-08, Vol.139 (1), p.1-7
Main Authors: Faqir, H., Chiba, H., Monnereau, O., Vacquier, G., Kikuchi, M., Syono, Y.
Format: Article
Language:English
Subjects:
(Bi,Pb)–Sr–Ca–Cu–O system
Oxide superconductors
superconductivity
X-ray diffraction
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Summary:The phase stabilization of the (Bi1.6+yPb0.4)Sr2−xCa2+xCu3Ozsystem has been studied in the composition ranges 0≤x≤0.25 and 0≤y≤0.4 by X-ray powder diffraction, magnetic susceptibility, and electrical resistivity measurements. The transformation from Bi2Sr2CaCu2O8to Bi2Sr2Ca2Cu3O10is a slow process and the Bi2Sr2Ca2Cu3O10phase can be stabilized by a small excess of Bi and partial substitution of Sr by Ca. A final, nearly pure Bi2Sr2Ca2Cu3O10phase (Tc=107 K, ΔTc=6–8 K) was obtained after 200 h annealing. Both X-ray analysis and magnetic susceptibility measurements appear to be excellent methods for monitoring such superconducting phases.
ISSN:0022-4596
1095-726X
DOI:10.1006/jssc.1997.7717