E-J characteristics and distribution of local J(c) for melt-textured grownbulk YBa2CU3O7 under high magnetic fields

Authors
Awaji, S Watanabe, K Motokawa, M Kuramochi, A Fukase, T Kimura, K
Citation
S. Awaji et al., E-J characteristics and distribution of local J(c) for melt-textured grownbulk YBa2CU3O7 under high magnetic fields, JPN J A P 2, 40(4A), 2001, pp. L330-L333
Citations number
8
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS → ACNP
Volume
40
Issue
4A
Year of publication
2001
Pages
L330 - L333
Database
ISI
SICI code
Abstract
In order to evaluate the distribution of flux pinning for a melt-textured g rown bulk YBa2Cu3O7 under magnetic fields, the E-J properties for samples p repared under various magnetic fields were measured. The measured E-J prope rties were analyzed on the basis of a local J(c) distribution model propose d by Yamafuji and Kiss [K. Yamafuji and T. Kiss: Physica C 290 (1997) 9]. T he distribution of local J(c) was found to narrow continuously with increas ing magnetic field applied to the melt growth process, independent of the c ritical current density. The weak links at subdomain boundaries were consid ered to improve as a result of the change in crystallinity.