DocumentCode
1478902
Title
A model for Jc in granular A-15 superconductors
Author
McDonald, Jason ; Barzi, Emanuela
Author_Institution
Vector Fields Inc., Aurora, IL, USA
Volume
11
Issue
1
fYear
2001
fDate
3/1/2001 12:00:00 AM
Firstpage
3884
Lastpage
3887
Abstract
The A-15 superconductors, specifically Nb3Sn, appear to be the best candidates for the next generation of high-field accelerator magnets. In order for these materials to be successfully employed in future magnets, a better understanding of their transport and magnetization properties must first be obtained. In this paper, a model is presented for the critical current density JC in a granular A-15 superconductor. The model is based on previous results for Josephson-coupled arrays, and anisotropic flux pinning by grain boundaries. It is shown that, contrary to what has previously been thought, the observed field dependence of JC can be explained without having to invoke a flux-shearing mechanism
Keywords
critical current density (superconductivity); flux pinning; grain boundaries; granular materials; magnetisation; type II superconductors; Josephson-coupled arrays; Nb3Sn; anisotropic flux pinning; critical current density; flux-shearing mechanism; grain boundaries; granular A-15 superconductors; high-field accelerator magnets; magnetic field dependence; magnetization properties; model; transport properties; Accelerator magnets; Critical current density; Granular superconductors; Magnetic materials; Magnetic properties; Magnetization; Niobium; Superconducting materials; Superconductivity; Tin;
fLanguage
English
Journal_Title
Applied Superconductivity, IEEE Transactions on
Publisher
ieee
ISSN
1051-8223
Type
jour
DOI
10.1109/77.919915
Filename
919915
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