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 journalArticle

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

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All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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