The Superconductivity of the Antimony-Doped Bi--Pb--Sr--Ca--Cu--O Compounds

Samples of nominal composition Bi sub 2--x--y Pb sub x Sb sub y Sr sub 2 Ca sub 2 Cu sub 3 O (x = 0-0.8, y =0-0.3) were prepared and investigated by X-ray, DTA, TG, and microprobe analyses. T sub c was measured by resistive and magnetic (DC susceptibility) methods. The addition of antimony exerted a...

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Published inSuperconductor science & technology Vol. 5; no. 11; pp. 654 - 657
Main Authors Popov, A G, Dovgopol, V P, Olevsky, F M, Pan, V M, Melnikov, V S
Format Journal Article
LanguageEnglish
Published 01.11.1992
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Summary:Samples of nominal composition Bi sub 2--x--y Pb sub x Sb sub y Sr sub 2 Ca sub 2 Cu sub 3 O (x = 0-0.8, y =0-0.3) were prepared and investigated by X-ray, DTA, TG, and microprobe analyses. T sub c was measured by resistive and magnetic (DC susceptibility) methods. The addition of antimony exerted a stabilizing influence on the formation of the 2223 phase, the solubility of Sb being < = 0.1 mole. The optimal temperatures of the formation of the 2223 phases with different lead and antimony content are in the range 835-840 deg C. Deviation from the optimal temperature of approx 1-2 deg C can be the cause of a sharp decrease in the volume of the 2223 phase. The anomalies at 240K revealed a temperature dependence of resistance and magnetic susceptibility for some samples with and without Sb.
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ISSN:0953-2048