Pinning effect on critical dynamics in Tl{sub 2}Ba{sub 2}CaCu{sub 2}O{sub 8} films before and after introducing columnar defects.

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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 C by 1.3 GeV U-ions along the normal of the film surface. The dose of 6.0 x 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 {sigma}{sub xx}(T, H) of the unirradiated sample exhibits 3D-XY scaling behavior that ... continued below

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7 p.

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Kim, J.-T. October 27, 1998.

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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 C by 1.3 GeV U-ions along the normal of the film surface. The dose of 6.0 x 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 {sigma}{sub xx}(T, H) of the unirradiated sample exhibits 3D-XY scaling behavior that reveals dynamic critical exponent z = 1.8 {+-} 0.1 and static critical exponent v {approx} 1.338. The results indicate that the weak interlayer coupling along the c-axis of Tl-2212 significantly influences static critical exponent v 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.

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7 p.

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INIS; OSTI as DE00011066

Medium: P; Size: 7 pages

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  • 1998 Applied Superconductivity Conference, Palm Desert, CA (US), 09/13/1998--09/18/1998

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  • Report No.: ANL/MSD/CP-97511
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 11066
  • Archival Resource Key: ark:/67531/metadc625917

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  • October 27, 1998

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  • June 16, 2015, 7:43 a.m.

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  • April 11, 2017, 3:17 p.m.

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Kim, J.-T. Pinning effect on critical dynamics in Tl{sub 2}Ba{sub 2}CaCu{sub 2}O{sub 8} films before and after introducing columnar defects., article, October 27, 1998; Illinois. (digital.library.unt.edu/ark:/67531/metadc625917/: accessed September 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.