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Titolo:
Processing of GdBa2Cu3O7-y bulk superconductor and its trapped magnetic field
Autore:
Nariki, S; Sakai, N; Murakami, M;
Indirizzi:
ISTEC, Superconduct Res Lab, Minato Ku, Tokyo 1050023, Japan ISTEC TokyoJapan 1050023 nduct Res Lab, Minato Ku, Tokyo 1050023, Japan
Titolo Testata:
PHYSICA C
, volume: 357, anno: 2001,
parte:, 1
pagine: 629 - 634
SICI:
0921-4534(200108)357:<629:POGBSA>2.0.ZU;2-8
Fonte:
ISI
Lingua:
ENG
Soggetto:
BA-CU-O; Y2BACUO5; SIZE; SM;
Keywords:
melt processing; trapped magnetic field; critical current density; Gd-Ba-Cu-O;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
13
Recensione:
Indirizzi per estratti:
Indirizzo: Nariki, S ISTEC, Superconduct Res Lab, Minato Ku, 1-16-25 Shibaura, Tokyo 1050023, Japan ISTEC 1-16-25 Shibaura Tokyo Japan 1050023 Tokyo 1050023, Japan
Citazione:
S. Nariki et al., "Processing of GdBa2Cu3O7-y bulk superconductor and its trapped magnetic field", PHYSICA C, 357, 2001, pp. 629-634

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 indiameter 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 J(c) and field-trapping capability. The trapped magnetic fieldof the bulk Gd-Ba-Cu-O/Ag made from Gd-211 particles 0.8 mum 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. (C) 2001 Elsevier Science B.V. All rights reserved.

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Documento generato il 03/07/20 alle ore 22:16:00