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Content Provider | IEEE Xplore Digital Library |
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Author | Muzzi, L. De Marzi, G. Fiamozzi Zignani, C. Affinito, L. Napolitano, M. Viola, R. Dominguez, C.O. Bottura, L. Le Naour, S. Richter, D. della Corte, A. |
Copyright Year | 2002 |
Abstract | We report on the magnetic and transport characterization of different NbTi commercial strands, carried out at variable temperature and magnetic field. From the critical current densities extracted from transport measurements and magnetization cycles we were able to calculate the normalized bulk pinning forces. The curves show good temperature scaling throughout the explored temperature range, and the reduced pinning force can be described by a simple two-components model system. The extension of the 2-components description of the pinning force to an expression for the critical current density gives a very good agreement with experimental measurements over the whole explored B, T range. The model works for all investigated samples, which are different in size, Cu:nonCu ratios, filament diameters and layouts. These results suggest that pinning mechanisms in conventional NbTi strands should be revised, since Nb-Ti composition gradients and grain boundaries seems to play a not negligible role. |
Sponsorship | Council on Superconductivity Appl. Superconductivity Conference Inc MIT |
Starting Page | 1496 |
Ending Page | 1499 |
Page Count | 4 |
File Size | 350094 |
File Format | |
ISSN | 10518223 |
Volume Number | 20 |
Issue Number | 3 |
Language | English |
Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Publisher Date | 2010-06-01 |
Publisher Place | U.S.A. |
Access Restriction | One Nation One Subscription (ONOS) |
Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Subject Keyword | Wires Force measurement Niobium compounds Titanium compounds Magnetic field measurement Critical current density Density measurement Current measurement Temperature distribution Magnetization transport measurements magnetic characterization superconducting NbTi strands |
Content Type | Text |
Resource Type | Article |
Subject | Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering |
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