Stability of high Tc phase in Bi2PbxSr2Ca2Cu3.1Oy superconductor

Gogia, Balvinder ; Kashyap, Subhash C. ; Pandya, D. K. ; Chopra, K. L. (1990) Stability of high Tc phase in Bi2PbxSr2Ca2Cu3.1Oy superconductor Solid State Communications, 73 (8). pp. 573-576. ISSN 0038-1098

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The effect of addition of Pb on zero resistance temperature, Tc (R=0), lattice parameters and stability of Bi2PbxSr2Ca2Cu3.1Oy superconductors is studied for x varying from 0.0 to 0.8 in the starting composition. The addition of Pb enhances the high Tc phase and a maximum Tc (R=0) of 105K is observed for the sample prepared with x=0.6. The lattice parameters of low and high Tc phases are aL = 5.40Å, bL = 5.42Å, cL = 30.70 Å and aH = 5.40 Å, bH = 5.42 Å, cH = 37.36 Å, respectively. A systematic variation in lattice parameters with addition of Pb has been observed. Lead containing samples exhibit a higher value of critical current (Ic) as well. On the basis of fractional changes in Ic and Tc (R=0) with exposure of superconducting sample to ambient conditions of atmosphere upto 50 days, it has been inferred that high Tc phase is most stable in the sample corresponding to 0.6Pb.

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ID Code:23044
Deposited On:25 Nov 2010 13:38
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