Dependence of surface resistance in HTS thin films on a dc magnetic field

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

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Abstract

We investigated the behavior of the surface resistance (Rs) of high-temperature superconductor (HTS) thin films exposed to a dc magnetic field (parallel to the c-axis). Measurements were done using the dielectric resonator method and superconducting magnet system. The DyBa2Cu 3O7-δ (DyBCO) and YBa2Cu 3O7-δ (YBCO) thin films (produced by THEVA GmbH) were prepared through a thermal co-evaporation method. The resonant frequency of the TE011 mode in the resonator was approximately 22 GHz. A dc magnetic field of up to 5 T was applied vertically to two parallel superconducting thin films placed into a closed-type Cu cavity. Rs of the DyBCO and YBCO thin films increased as the applied dc magnetic field increased. The Rs ratio (defined as Rs(5 T)/R s(0 T)) of the DyBCO and YBCO thin films at 4.5 K was approximately 5 and 50, respectively. These results indicate that the DyBCO thin film may be better for use in low-temperature nuclear magnetic resonance applications.

Original languageEnglish
Pages (from-to)3692-3695
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Volume15
Issue number2 PART III
DOIs
Publication statusPublished - Jun 1 2005
Externally publishedYes

All Science Journal Classification (ASJC) codes

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

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    Saito, A., Shirakawa, M., Kitamura, K., Noguchi, Y., Mukaida, M., Yamasaki, H., Nakagawa, Y., & Ohshima, S. (2005). Dependence of surface resistance in HTS thin films on a dc magnetic field. IEEE Transactions on Applied Superconductivity, 15(2 PART III), 3692-3695. https://doi.org/10.1109/TASC.2005.849394