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 |
|---|---|
| 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 |
| Externally published | Yes |
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Keywords
- Critical current density
- Gd-Ba-Cu-O
- Melt processing
- Trapped magnetic field
ASJC Scopus subject areas
- Condensed Matter Physics
Cite this
Processing of GdBa2Cu3O7-y bulk superconductor and its trapped magnetic field. / Nariki, S.; Sakai, Naomichi; Murakami, Masato.
In: Physica C: Superconductivity and its Applications, Vol. 357-360, No. SUPPL. 2, 08.2001, p. 629-634.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Processing of GdBa2Cu3O7-y bulk superconductor and its trapped magnetic field
AU - Nariki, S.
AU - Sakai, Naomichi
AU - Murakami, Masato
PY - 2001/8
Y1 - 2001/8
N2 - 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.
AB - 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.
KW - Critical current density
KW - Gd-Ba-Cu-O
KW - Melt processing
KW - Trapped magnetic field
UR - http://www.scopus.com/inward/record.url?scp=0035422702&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0035422702&partnerID=8YFLogxK
U2 - 10.1016/S0921-4534(01)00352-5
DO - 10.1016/S0921-4534(01)00352-5
M3 - Article
AN - SCOPUS:0035422702
VL - 357-360
SP - 629
EP - 634
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
IS - SUPPL. 2
ER -