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Increase of Tc and disappearance of the structural modulation in the system Bi-Sr-Sm-Ce-Cu-O upon Pb substitution

Publication Type

Journal Article

Authors

Remschnig, K., J.M. Tarascon, Ramamoorthy Ramesh, G.W. Hull, P. Rogl

DOI

10.1016/0921-4534(90)90325-9

Abstract

The substitution of bismuth by lead was performed in the compound Bi2-xPbxSr2(Sm0.85Ce0.15)2Cu2O10+y. Its influence on the superconducting properties as well as on the structure was studied by X-ray diffraction, transmission electron microscopy (TEM) and various transport measurements. Lead was found to replace bismuth up to approximately x = 1, superconductivity occurring with a maximum Tc of 34-36 K at concentrations of x greater than 0.6. Resistivity data show a transition from semiconducting to metallic/superconducting behavior. Increasing lead content is accompanied by a decrease in the oxygen content with a corresponding decrease of the structural modulation which is directly correlated to the excess oxygen. At x = 0.9 this compound does not show a structural modulation, but still superconducts at 36 K. © 1990.

Journal

Physica C: Superconductivity and its applications

Volume

170

Year of Publication

1990

ISSN

09214534

Notes

cited By 15

Research Areas

Ramesh Lab