Critical current properties at low angle grain boundaries in ErBa2Cu3Oy films

S. Horii, T. Horide, K. Matsumoto, T. Ozaki, Y. Ichino, Masashi Mukaida, Y. Yoshida, A. Ichinose, J. Shimoyama, K. Kishio

    研究成果: ジャーナルへの寄稿学術誌査読


    We report superconducting properties at a low angle grain boundary (GB) with a tilt angle of 5° for ErBa2Cu3Oy (Er123) films with various oxygen contents (y) and impurity-doping levels of strontium (Sr). A drastic change in critical temperatures was not observed between the films with and without a minute doping of Sr. However, the magnetic field dependence of critical current density (Jc) at GB and current density-voltage curves at GB for the Sr-doped Er123 film with a slightly carrier-overdoped state revealed that the effects of a minute Sr-doping showed good similarity to a case of the heavy Ca-doping into Y123 films. This probably means that electronic and/or crystallographic structures at GB of Er123 bicrystals were drastically changed by the Sr-doping.

    ジャーナルPhysica C: Superconductivity and its applications
    出版ステータス出版済み - 9月 15 2008

    !!!All Science Journal Classification (ASJC) codes

    • 凝縮系物理学


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