In:
Japanese Journal of Applied Physics, IOP Publishing, Vol. 31, No. 8R ( 1992-08-01), p. 2411-
Abstract:
Transport critical current density ( J ct ) measurements were performed on bulk oriented-grained YBa 2 Cu 3 O x /Silver composites in the presence of a magnetic field ( B ). J ct of these composites exhibit strong anisotropic behavior when the angle between the applied field and the c -axis of the specimen is varied. Two J ct peaks were observed; a sharp peak centered at B perpendicular to the c -axis and a J ct value roughly 3 times higher than that of the minimum J ct is found. Another broader and weaker peak is found to be centered at B parallel to the c -axis. This anisotropic behavior is detected at all field strengths investigated at 77 K. The effects of Ag as well as Y 2 BaCuO 5 (2-1-1) additions on J ct were also investigated. Relatively small amount of randomly distributed normal-phase particles are found to have negligible effect on the J ct anisotropy. The large Ag inclusions are determined to be ineffective pinning centers and J ct decreases with Ag content. The 0.5 to 2 µm size 2-1-1 additions, however, appear to enhance the J ct of the composites.
Type of Medium:
Online Resource
ISSN:
0021-4922
,
1347-4065
DOI:
10.1143/JJAP.31.2411
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
1992
detail.hit.zdb_id:
218223-3
detail.hit.zdb_id:
797294-5
detail.hit.zdb_id:
2006801-3
detail.hit.zdb_id:
797295-7
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