Abstract
The substitution of strontium for lead in the material (La1.5Pb0.5−x Sr x )CuO z , x = 0–0.15 has been carried out. A stable and reproducible single phased superconducting materials can be obtained inside an evacuated quartz tube. The X-ray diffraction pattern shows that the superconducting phase can be indexed on the basis of an orthorhombic symmetry (F mmm) for x = 0 and on the basis of tetragonal symmetry (I 4/mmm) for x > 0. The transition temperature T c increases as the strontium substitution parameter x increases. We observed the maximal T c around x = 0.15 with 38 K with fairly large Meissner volume fraction of 38% (FC).
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Kandyel, E., Adachi, S. & Tajima, S. Synthesis, Structure, and Superconductivity of (La1.5Pb0.5−xSrx)CuOz . Journal of Superconductivity 13, 121–128 (2000). https://doi.org/10.1023/A:1007790512982
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DOI: https://doi.org/10.1023/A:1007790512982