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Comparison between the magnetic and transport critical current densities in high critical current density melt-textured yttrium barium copper-oxideUsing a recently developed pulsed critical current density (Jc) measuring system, the Jc of the high-Jc melt-textured YBa2Cu3O(7-delta) (Y123) bulk samples has been determined. I-V curves with a voltage resolution of 0.5 microV were obtained, and transport Jc's along the a-b plane as high as 7.2 x 10 to the 4th A/sq cm were extracted. These results are comparable to the values obtained magnetically. On the other hand, transport Jc along the c axis were found to be two orders of magnitude smaller, even though the magnetic Jc along the c axis is only about five times smaller than Jc along the a-b plane. It is suggested that for the high-temperature superconducting materials which are highly anisotropic, caution should be taken when using the nontransport magnetic methods to determine Jc.
Document ID
19910035875
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Gao, L.
(Houston Univ. TX, United States)
Meng, R. L.
(Houston Univ. TX, United States)
Xue, Y. Y.
(Houston Univ. TX, United States)
Hor, P. H.
(Houston Univ. TX, United States)
Chu, C. W.
(Houston, University TX, United States)
Date Acquired
August 15, 2013
Publication Date
January 7, 1991
Publication Information
Publication: Applied Physics Letters
Volume: 58
ISSN: 0003-6951
Subject Category
Solid-State Physics
Accession Number
91A20498
Funding Number(s)
CONTRACT_GRANT: NSF DMR-86-126539
CONTRACT_GRANT: NAGW-977
CONTRACT_GRANT: MDA972-88-G-0002
Distribution Limits
Public
Copyright
Other

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