TY - JOUR
T1 - Processing of GdBa2Cu3O7-y bulk superconductor and its trapped magnetic field
AU - Nariki, S.
AU - Sakai, N.
AU - Murakami, M.
N1 - Funding Information:
This work is supported by the New Energy and Industrial Technology Development Organization (NEDO) as Collaborative Research and Development of Fundamental Technologies for Superconductivity Applications under the New Sunshine Program administered by the Agency of Industrial Science and Technology (AIST) of the Ministry of International Trade and Industry (MITI) of Japan.
Copyright:
Copyright 2005 Elsevier B.V., All rights reserved.
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 -