Temperature and dc magnetic field dependence of the surface resistance in HTS films

A. Saito, M. Shirakawa, K. Kitamura, Y. Noguchi, M. Mukaida, H. Yamasaki, Y. Nakagawa, S. Hirano, S. Ohshima

    Research output: Contribution to journalConference articlepeer-review

    2 Citations (Scopus)

    Abstract

    We investigated the dependence of the surface resistance (Rs) in high-temperature superconductor (HTS) thin films on a dc magnetic field (parallel to the c-axis) and temperature. Measurements were done using the dielectric resonator method and superconducting magnet system. The YBa 2Cu3O7-δ (YBCO) and DyBa 2Cu3O7-δ (DyBCO) thin films produced by THEVA GmbH were prepared through a thermal co-evaporation method. The R s of the YBCO and DyBCO thin films increased with magnitude of a dc magnetic field. The Rs(5 T)/Rs(0 T) of the DyBCO was lower than that of the YBCO thin films for the temperature region below 40 K. From the results of the field-cooled (FC) and zero-field-cooled (ZFC) measurements of Rs, it was found that there was plenty of flux pinning in the DyBCO thin films compared with the YBCO thin films. These results indicate that the DyBCO thin films with much pinning centers are better for use in low temperature nuclear magnetic resonance applications.

    Original languageEnglish
    Pages (from-to)1606-1610
    Number of pages5
    JournalPhysica C: Superconductivity and its applications
    Volume426-431
    Issue numberII
    DOIs
    Publication statusPublished - 2005
    EventProceedings of the 17th Internatioanl Symposium on Superconductivity (ISS 2004) Advances in Superconductivity -
    Duration: Nov 23 2004Nov 25 2004

    All Science Journal Classification (ASJC) codes

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics
    • Energy Engineering and Power Technology
    • Electrical and Electronic Engineering

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