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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Jin-Tae Kim Park, Y.K. Park, J.-C. Kang, W.N. Chu, C.W. Lim, H.R. Kim, D.H. Lee, J.U. Gray, K.E. |
| Copyright Year | 2002 |
| Abstract | The effect of columnar defects on the critical dynamics of superconducting Tl/sub 2/Ba/sub 2/CaCu/sub 2/O/sub 8/ (Tl-2212) film has been investigated. The Tl-2212 film was irradiated at 0/spl deg/C by 1.3 GeV U-ions along the normal of the film surface. The dose of 6.0/spl times/10/sup 10/ ions/cm/sup 2/ of the U-ion irradiation corresponds to a matching field of 1.2 T. The in-plane longitudinal resistivity of the irradiated Tl-2212 has been measured as a function of magnetic field H and temperature T. The extracted fluctuation part of the conductivity /spl sigma//sub xx/(T, H) of the unirradiated sample exhibits 3D-XY scaling behavior that reveals dynamic critical exponent z=1.8/spl plusmn/0.1 and static critical exponent /spl nu//spl ap/1.338. The results indicate that the weak interlayer coupling along the c-axis of Tl-2212 significantly influences static critical exponent /spl nu/ and does not change dynamical critical exponent. After the irradiation, the fluctuation conductivities are enhanced by the strong pinnings and do not exhibit the same 3D-XY scaling behavior as for the unirradiated Tl-2212. Particularly at the low magnetic field values near the matching field of 1.2 T, the fluctuation conductivities show a clear deviation from the critical dynamics, suggesting that the pinning effect on the critical dynamics is significant. |
| Sponsorship | Council on Superconductivity Appl. Superconductivity Conference Inc MIT |
| Starting Page | 2296 |
| Ending Page | 2299 |
| Page Count | 4 |
| File Size | 393685 |
| 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 | Magnetic films Magnetic fields Superconducting films Fluctuations Magnetic field measurement Yttrium barium copper oxide Conductivity measurement Scanning electron microscopy Temperature Superconductivity |
| Content Type | Text |
| Resource Type | Article |
| Subject | Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering |
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