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Composition analysis of Ca-doped YBa2 Cu3 O7−δ/Y2 Ba Cu O5 prepared by the top-seeding melt-texture growth
Supercond. Sci. Technol. 15 (2002) 222-225，-0001，（）：
The Ca-doped YBa2Cu3O7−δ/Y2BaCuO5 bulk-textured superconductors were prepared by using the top-seeding melt-textured growth process. Composition analyses were made for such prepared samples. We found that Ca concentration in the YBa2Cu3O7−δ grains decreased along the growing direction; Ca preferred to substitute Y in the YBa2Cu3O7−δ grains, rather than to stay at the grain boundary. The accumulation of extra CuO at the growth front was considered as one of the causes of the inhomogeneous distribution of Ca.
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