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

    Research output: Contribution to journalArticlepeer-review

    Abstract

    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.

    Original languageEnglish
    Pages (from-to)1670-1673
    Number of pages4
    JournalPhysica C: Superconductivity and its applications
    Volume468
    Issue number15-20
    DOIs
    Publication statusPublished - Sep 15 2008

    All Science Journal Classification (ASJC) codes

    • Condensed Matter Physics

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