Abstract
The superconducting transition of the organic compoundsκ-(BEDT-TTF)2 X is studied by resistive measurement in a magnetic field up to 10 T applied normal to the conducting plane. For the salts withX=Cu[N(CN)2]Br andX=CuCN[N(CN)2] the transition shows fanshaped broadening caused by superconductivity fluctuation. For theX=Cu(NCS)2 salt the resistivity shows a peak in the transition region in a magnetic field below 4 T.This phenomenon is suppressed in defect-reduced samples for intralayer conduction. We discuss this peak in relation to the thermal fluctuation on the Josephson junction structures in this salt.
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We thank Dr. M. Suzuki (NTT Interdisciplinary Research Labs.) for information on [12] concerning the resistance upturn in Ba1-x K x BiO3 polycrystalline film. This work was supported by a Grant-in-Aid for Scientific Research from the Ministry of Education, Science, and Culture of Japan.
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Ito, H., Ishiguro, T., Komatsu, T. et al. Resistive superconducting transition of κ-type BEDT-TTF organic superconductors in a magnetic field. J Supercond 7, 667–669 (1994). https://doi.org/10.1007/BF00728482
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DOI: https://doi.org/10.1007/BF00728482