Abstract
Large c-axis oriented GdBa2Cu3O7-y (Gd-123) bulk superconductors, which contain Gd2BaCuO5 (Gd-211) secondary phase and Ag, were melt textured under controlled oxygen partial pressure of 1.0%. Nd-123 was used as a seed crystal for the growth of large-grain bulk. Single-domain Gd-123 samples 32 mm in diameter were successfully fabricated with no macro-sized cracks. The employment of fine starting Gd-211 powders led to a reduction in the mean diameter of Gd-211 particles dispersed in the bulk, which resulted in an improvement in both Jc and field-trapping capability. The trapped magnetic field of the bulk Gd-Ba-Cu-O/Ag made from Gd-211 particles 0.8 μm in diameter reached 1.5 T at 77 K. Furthermore, the trapped magnetic field could be improved by the enlargement of bulk diameter and the optimization of Gd-211 content. The maximum trapped field of 2.0 T at 77 K was achieved for the Gd-Ba-Cu-O/Ag bulk sample 48 mm in diameter with the composition of Gd-123:Gd-211 = 10:5.
Original language | English |
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Pages (from-to) | 629-634 |
Number of pages | 6 |
Journal | Physica C: Superconductivity and its applications |
Volume | 357-360 |
Issue number | SUPPL. 2 |
DOIs | |
Publication status | Published - 2001 Aug 1 |
Externally published | Yes |
Keywords
- Critical current density
- Gd-Ba-Cu-O
- Melt processing
- Trapped magnetic field
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering