Transport measurements of high-Tc superconductors at megagauss magnetic fields by means of a radio frequency transmission technique

T. Sekitani, Y. H. Matsuda, S. Ikeda, K. Uchida, F. Herlach, N. Miura, K. Nakao, T. Izumi, S. Tajima, M. Murakami, S. Hoshi, T. Koyama, Y. Shiohara

Research output: Contribution to journalConference articlepeer-review

5 Citations (Scopus)


We measured the upper critical field (B∥CuO2 plane) of optimally doped YBCO thin films (Tc~90 K) in very high magnetic fields up to 200 T generated in the single-turn coil and up to 400 T by electromagnetic flux compression. In order to overcome experimental difficulties such as high voltage induced in the measuring circuit and eddy current heating of the sample, we used a contactless radio frequency transmission technique. Clear evidence of the superconducting to normal (S-N) transition was observed for the magnetic field perpendicular to the c-axis at various temperatures. The results are consistent with our previous data obtained by means of the microwave strip-line technique. Including the data from higher fields up to 400 T, a complete magnetic phase diagram on the B-T plane has been constructed for YBCO. In addition to the S-N transition, the observed signal was found to reflect the vortex dynamics.

Original languageEnglish
Pages (from-to)116-122
Number of pages7
JournalPhysica C: Superconductivity and its applications
Issue numberPART 1
Publication statusPublished - 2003 Oct
Externally publishedYes
EventProceedings of the 15th International Symposium on Superconduc - Yokohama, Japan
Duration: 2002 Nov 112002 Nov 13


  • High magnetic field
  • Magneto-transport
  • S-N transition
  • YBaCuO

ASJC Scopus subject areas

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


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