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期刊论文
Microstructure and superconductivity of the melt-textured YBCO grown with the addition of SnO2
Physica C 341-348 (2000) 1987-1988，-0001，（）：
Large domain YBa2 Cu3 07-δ/2BaCuO5 (YBCO) samples were prepared by top-seeded melt-textured process, with the addition of SnO2 and CeO2 or PtO2. It was found that, in comparison to that in the CeO2-doped sample, the YBa2 Cu3 O7-δ(123) matrix was twisted in the PtO2-doped sample and its Y2BaCuO5 (211) particles were larger on average and less homogeneously distributed. The PtO2-doped sample showed a more obvious second-peak effect, and higher values of a-b plane critical current density (3Jcab) and irreversibility fields (Bt,,). The enhancement of3 Jcab is related to the microstructure inhomogeneity and the core surface AK pinning.
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