TY - JOUR
T1 - Transport measurements of high-Tc superconductors at megagauss magnetic fields by means of a radio frequency transmission technique
AU - Sekitani, T.
AU - Matsuda, Y. H.
AU - Ikeda, S.
AU - Uchida, K.
AU - Herlach, F.
AU - Miura, N.
AU - Nakao, K.
AU - Izumi, T.
AU - Tajima, S.
AU - Murakami, M.
AU - Hoshi, S.
AU - Koyama, T.
AU - Shiohara, Y.
N1 - Funding Information:
We are obliged to Dr. Eiji Omichi, Dr. Takashi Hayashi, Dr. Takashi Ikaida, Kazuo Ono, and Prof. Toshihito Osada for technical support and valuable discussions. This work was supported by a Grant-in-Aid for Scientific Research from the Ministry of Education, Science, Sports and Culture, Japan and the New Energy and Industrial Technology Development Organization (NEDO).
PY - 2003/10
Y1 - 2003/10
N2 - 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.
AB - 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.
KW - High magnetic field
KW - Magneto-transport
KW - S-N transition
KW - YBaCuO
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U2 - 10.1016/S0921-4534(03)01111-0
DO - 10.1016/S0921-4534(03)01111-0
M3 - Conference article
AN - SCOPUS:0042283877
SN - 0921-4534
VL - 392-396
SP - 116
EP - 122
JO - Physica C: Superconductivity and its applications
JF - Physica C: Superconductivity and its applications
IS - PART 1
T2 - Proceedings of the 15th International Symposium on Superconduc
Y2 - 11 November 2002 through 13 November 2002
ER -