Finite Size Effects in YBCO Films in Zero and Non-Zero Field

ORAL

Abstract

The phase transition in high Tc superconductors in a magnetic field has been intensely studied. However, only a few papers have discussed finite-size effects (Phys. Rev. B \textbf{69}, 214524 (2004)). Neglecting finite size effects can cause misinterpretation of the experimental data leading to incorrect critical exponents. We will report results of DC transport measurements on YBa2Cu3O6.95 films in zero field (less than 50 nT) as well as in fields up to 6 T. The results will be analyzed in terms of field-induced finite size effects and thickness-induced finite size effects.

*This work was supported by NSF grant number DMR-0302596

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Authors

  • Su Li

    • Center for Superconductivity Research, Department of Physics, University of Maryland, College Park

  • Hua Xu

    • Center for Superconductivity Research, Department of Physics, University of Maryland, College Park

  • M. C. Sullivan

    • Department of Physics, Ithaca College

  • Steven Anlage

    • Univ. of MD-College Park, USA.
    • CSR, Physics Dept., University of Maryland, USA
    • Center for Superconductivity, Department of Physics, University of Maryland, College Park, MD 20742
    • Center for Superconductivity Research, Department of Physics, University of Maryland, College Park
    • Univ. of Maryland, College Park
    • University of Maryland, College Park
    • Dept of Physics, Univ of Maryland, College Park
    • Center for Superconductivity Research, Department of Physics, University of Maryland

  • C. J. Lobb

    • Center for Superconductivity Research, Department of Physics, University of Maryland, College Park