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Content Provider | IEEE Xplore Digital Library |
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Author | Naus, M.T. Lee, P.J. Larbalestier, D.C. |
Copyright Year | 2002 |
Abstract | We have studied the reaction conditions and properties of a high-Sn, internal-Sn Nb/sub 3/Sn conductor whose overall Cu-Sn composition was Cu-29 at.%Sn. By adjusting the mixing heat treatment during which the Cu and Sn interdiffuse prior to A15 reaction, it is possible to substantially surround the Nb filaments with /spl alpha/ and/or /spl epsi/-phase Cu-Sn. It does not seem possible, however, to homogeneously mix the Cu and Sn prior to A15 formation. The T/sub c/ distributions, measured both by SQUID and heat capacity, showed no dependence on significantly different mixing heat treatments. Magnetization measurements at 4.2 K and 12 K also showed that there were no significant differences in the H/sup */, H/sub c2/ and J/sub c/ (as indicated by /spl Delta/m). This implies that the composition and reaction behavior of the A15 phase is independent of the Cu-Sn phase in contact with the Nb filament prior to the reaction heat treatment and that scoping experiments on high-Sn, high-J/sub c/ internal-Sn conductors can be considerably simplified. Our studies suggest a new Cu-Nb-Sn intermetallic phase with a composition of Cu-23 at.%Nb-62at.%Sn. |
Sponsorship | Council on Superconductivity Appl. Superconductivity Conference Inc MIT |
Starting Page | 3569 |
Ending Page | 3572 |
Page Count | 4 |
File Size | 467771 |
File Format | |
ISSN | 10518223 |
Volume Number | 11 |
Issue Number | 1 |
Language | English |
Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Publisher Date | 2001-03-01 |
Publisher Place | U.S.A. |
Access Restriction | One Nation One Subscription (ONOS) |
Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Subject Keyword | Tin Heat treatment Temperature Conductors Niobium Niobium-tin Superconducting filaments and wires SQUIDs Magnetization Helium |
Content Type | Text |
Resource Type | Article |
Subject | Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering |
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