Superconductive and Magnetic Properties of Bi2Sr2Ca2Cu3O10+δ Ceramics Doped by Pb

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Abstract

Among the superconducting phases of bismuth-based Bi–Sr–Ca–Cu–O, compound Bi2Sr2Ca2Cu3O10+δ (Bi-2223) is the most interesting because of its relatively high critical temperature (T C =95–110 K) and numerous applications. However, this phase is also known for its low stability and the difficulty of purifying parasites phases including the Bi-2212. To this end, the Pb used in relatively high proportions can stabilize, purify, and improve the further enhancement of T C . The influence of Pb on structural, superconducting and magnetic properties has been extensively investigated in polycrystalline Bi2−x Pb x Sr2Ca2Cu3O10+δ ceramics (0<x<1). For low Pb amounts, structural analysis shows that the Bi-2223 phase is difficult to achieve without the Bi-2212 phase, and for high Pb content a large fraction of secondary phases containing Pb is detected. Our results confirm that the optimal Pb content for obtaining a Bi-2223 single phase is x=0.3, 0.4.

Keywords

(Bi,Pb)-2223 phase Doping X-ray diffraction Superconductors Susceptibility 
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© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  1. 1.Département de PhysicsUniversité MentouriConstantineAlgeria

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