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Content Provider | IEEE Xplore Digital Library |
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Author | Yun Zhu Miura, O. Ito, D. |
Copyright Year | 2002 |
Abstract | Anisotropy of upper critical fields B/sub C2/ and irreversibility fields B/sub i/ was investigated for multifilamentary Nb-Ti composites having artificial pinning centers in perpendicular and parallel magnetic fields to the filament axis. It was observed that the B/sub C2/spl par// exceeded the B/sub C2/spl perp// below a certain temperature T/sup */ and the temperature dependence of B/sub C2/spl par// was close to (1-T/T/sub c/)/sup 0.5/. These results suggest that dimensional crossover occurs at T/sup */, i.e., the magnetic flux system in the parallel field changes from 3D to 2D state as predicted by the Takahashi-Tachiki theory for multilayer superconductors. B/sub i/spl par// is also enhanced due to no restriction of the superconductor size, as explained by the flux creep theory. Consequently, the flux pinning strength in the parallel magnetic field to the filament axis increased at high fields. Furthermore, tape specimens with arranged plate-like pins fabricated by rolling process indicated expected enhancement of flux pinning. |
Sponsorship | Council on Superconductivity Appl. Superconductivity Conference Inc MIT |
Starting Page | 3355 |
Ending Page | 3358 |
Page Count | 4 |
File Size | 623386 |
File Format | |
ISSN | 10518223 |
Volume Number | 13 |
Issue Number | 2 |
Language | English |
Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Publisher Date | 2003-06-01 |
Publisher Place | U.S.A. |
Access Restriction | One Nation One Subscription (ONOS) |
Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Subject Keyword | Pins Anisotropic magnetoresistance Microstructure Magnetic fields Temperature dependence Superconductivity Flux pinning Magnetic flux Magnetic multilayers Creep |
Content Type | Text |
Resource Type | Article |
Subject | Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering |
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