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

研究成果査読

5 被引用数 (Scopus)

抄録

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.

本文言語English
ページ(範囲)116-122
ページ数7
ジャーナルPhysica C: Superconductivity and its applications
392-396
PART 1
DOI
出版ステータスPublished - 2003 10
外部発表はい
イベントProceedings of the 15th International Symposium on Superconduc - Yokohama, Japan
継続期間: 2002 11 112002 11 13

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • エネルギー工学および電力技術
  • 電子工学および電気工学

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