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High Tc composite silver/oxide superconductorsFactors involved in the strong flux pinning effect of high-Tc YBa2Cu3O7/AgO (Y-123/AgO) composite and other REE-123/AgO composites were investigated. Samples of superconducting REE-123 and REE-123/AgO (where REE was Nd, Sm, Eu, Gd, Dy, Ho, Er, or Y) were prepared and used to obtain magnetic moments, critical field, and microstructure data. The optimum heat treatment conditions for the formation of strong flux-pinning REE-123/AgO composites were found to be different for different REE-123 compounds. It was found that the annealing temperature depends on the ionic size of the REE, with larger rare-earth ions requiring higher temperature. It was also found that strong flux-pinning REE-123/AgO composites form only in a narrow annealing temperature range.
Document ID
19900035834
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Curreri, P. A. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Peters, P. N. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Sisk, R. C. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Wu, M. K. (Columbia University New York, United States)
Huang, C. Y. (Lockheed Missiles and Space Co., Inc. Palo Alto, CA, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1990
Publication Information
Publication: Metallurgical Transactions A - Physical Metallurgy and Materials Science
Volume: 21A
ISSN: 0360-2133
Subject Category
Solid-State Physics
Report/Patent Number
ISSN: 0360-2133
Accession Number
90A22889
Funding Number(s)
CONTRACT_GRANT: NCC8-6
Distribution Limits
Public
Copyright
Other

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