@article{34004, keywords = {Bismuth compounds, High temperature superconductors, Ceramic materials, Oxide superconductors, Microscopic Examination–Transmission Electron Microscopy, Lead and Alloys, X-rays–Diffraction, Bismuth Strontium Samarium Cerium Copper Oxides, Structural Modulation}, author = {K Remschnig and J.M Tarascon and Ramamoorthy Ramesh and G.W Hull and P Rogl}, title = {Increase of Tc and disappearance of the structural modulation in the system Bi-Sr-Sm-Ce-Cu-O upon Pb substitution}, 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.}, year = {1990}, journal = {Physica C: Superconductivity and its applications}, volume = {170}, number = {3-4}, pages = {284-290}, issn = {09214534}, doi = {10.1016/0921-4534(90)90325-9}, note = {cited By 15}, language = {eng}, }