MO observation of flux penetration into high-Tc superconductors with grain boundaries

N. Chikumoto, K. Furusawa, M. Murakami, S. Tajima

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


Effect of grain boundaries on the magnetic field distributions in YBCO was studied by use of magneto-optical (MO) imaging technique. The grain boundary was artificially introduced with a multi-seeded melt-growth process. The current distribution in the sample was obtained from the MO image using an inversion scheme based on the inverse-matrix method. With this technique, we could obtain intergranular and intragranular critical current densities. Large depression of the intergranular critical current was observed in the sample with large misorientation angles.

Original languageEnglish
Pages (from-to)1005-1010
Number of pages6
JournalPhysica C: Superconductivity and its applications
Issue numberSPEC. ISS.
Publication statusPublished - 2004 Oct


  • Critical current density
  • Grain boundary
  • Magneto-optical imaging
  • Y123

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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