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Effective activation energy in the Bi-Sr-Ca-Cu-O systems [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 1992.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
4 pages : digital, PDF file
Additional Creators
Argonne National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
Magnetic relaxation in the Bi-Sr-Ca-Cu-O systems has been investigated in a wide temperature regime. Previously reported studies of the effective activation energy, U, have been controversial in terms of temperature and field dependence of the critical current density, j{sub c}. We have considered the temperature dependence of j{sub c} and constructed the U-j (or M) curves for the Bi-Sr-Ca-Cu-O system. We found that at a constant driving force and temperature, U is considerably higher for 2245 samples than for 2223 samples. This enhancement can be attributed to the flux pinning from finely dispersed calcium- and copper- rich precipitates.
Report Numbers
E 1.99:anl/cp--77481
E 1.99: conf-920802--36
conf-920802--36
anl/cp--77481
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Note
Published through SciTech Connect.
08/01/1992.
"anl/cp--77481"
" conf-920802--36"
"DE93002996"
Applied superconductivity conference,Chicago, IL (United States),23-28 Aug 1992.
Smith, M.; Sengupta, S.; Shi, D.; Wang, Z.; McGinn, P.J.
Funding Information
W-31109-ENG-38
FG02-90ER45427
View MARC record | catkey: 14456522