We investigated the effect of RE2BaCuO5 (RE211) contents on the superconducting properties of melt-textured RE-Ba-Cu-O bulk superconductors (RE: Ho, Er and Y). REBa2Cu3Oy (RE123) samples containing 5-40 mol% of RE211 were fabricated with the cold-seeding method in air using an Nd123 bulk seed crystal. The superconducting properties of the Ho-Ba-Cu-O samples were strongly affected by the Ho211 content and the oxygen-annealing temperature. In the Jc-B curves of the Ho-Ba-Cu-O samples with low-Ho211 contents, the secondary peak effect was clearly observed. The peak position shifted to lower fields with increasing oxygen-annealing temperature, presumably due to an increase in oxygen-vacancies. The secondary peak effect was also found in the Er- and Y-Ba-Cu-O samples with 5 mol% of RE211.
|ジャーナル||Physica C: Superconductivity and its applications|
|出版ステータス||Published - 2003 10月|
|イベント||Proceedings of the 15th International Symposium on Superconduc - Yokohama, Japan|
継続期間: 2002 11月 11 → 2002 11月 13
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