抄録
Large c-axis oriented Gd-Ba-Cu-O bulk superconductors with Ag addition were melt-textured under controlled oxygen partial pressure of 1.0%. Nd123 was used as a seed crystal for the growth of large grain bulk. Single grain Gd-Ba-Cu-O samples of diameters 32 mm and 48 mm were successfully fabricated with no macro-sized cracks. Using fine Gd211 powder as a starting material remarkably reduced the size of 211 particles dispersed in the bulk. As a result, high critical current density (Jc) of 60000 - 70000 A/cm2 in a self-field was achieved at 77K. The trapped magnetic fields of the samples 32 mm and 48 mm in diameter reached 1.5T and 1.8T at 77K, respectively. These values are comparable to that of a melt-textured Sm-Ba-Cu-O bulk in similar size, and exceeds those of an Y-Ba-Cu-O bulk and the previous Gd-Ba-Cu-O bulk.
| 本文言語 | English |
|---|---|
| ページ（範囲） | 2409-2412 |
| ページ数 | 4 |
| ジャーナル | Physica C: Superconductivity and its applications |
| 巻 | 341-348 (IV) |
| DOI | |
| 出版ステータス | Published - 2000 11月 |
| 外部発表 | はい |
| イベント | International Conference on Materials and Mechanisms of Superconductivity High Temperature Superconductors VI - Houston, TX, USA 継続期間: 2000 2月 20 → 2000 2月 25 |
ASJC Scopus subject areas
- 電子材料、光学材料、および磁性材料
- 凝縮系物理学
- エネルギー工学および電力技術
- 電子工学および電気工学