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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Cooley, L.D. Hawes, C.D. Lee, P.J. Larbalestier, D.C. |
| Copyright Year | 2002 |
| Abstract | Multilayers of Nb47Ti superconductor (S) and titanium pins (N) have been made with a critical temperature T/sub c/ and an upper critical field H/sub c2/ approaching bulk values. There is no proximity effect suppression of T/sub c/ and H/sub c2/ for layer thickness d/sub S/=d/sub N/=10 nm, in contrast to the strong suppression for comparable multilayers made with Cu, Cu-alloy, or Nb pins. This may be because the proximity length of the Ti layers, /spl sim/10 nm, is less than or equal to their thickness. The critical current density J/sub c/ exhibits, multiple peaks in J/sub c/(H), which suggests that matching effects contribute to the overall pinning. J/sub c/ for 20 nm bilayers is comparable to that of Nb47Ti tapes, which have a higher number density of pins but a lower pin volume fraction. The weak proximity coupling suggests that much higher J/sub c/ can be obtained if smaller bilayer periods can be made with good adhesion. The results are compared to other Nb-Ti/Ti multilayer experiments, and stability limitations are also discussed. |
| Sponsorship | Council on Superconductivity Appl. Superconductivity Conference Inc MIT |
| Starting Page | 1743 |
| Ending Page | 1746 |
| Page Count | 4 |
| File Size | 597815 |
| File Format | |
| ISSN | 10518223 |
| Volume Number | 9 |
| Issue Number | 2 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 1999-06-01 |
| Publisher Place | U.S.A. |
| Access Restriction | One Nation One Subscription (ONOS) |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Critical current density Nonhomogeneous media Pins Superconducting epitaxial layers Niobium Superconducting materials Proximity effect Nanostructured materials Temperature Flux pinning |
| Content Type | Text |
| Resource Type | Article |
| Subject | Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering |
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