Magneto-optical characterizations of composite superconductors

M. Zamboni, M. Muralidhar, S. Koishikawa, M. Murakami

Research output: Contribution to journalConference articlepeer-review

3 Citations (Scopus)


The magnetic flux dynamic in RE-Ba-Cu-O (RE = La, Nd, Sm, Eu or Gd) composite superconductors processed by the oxygen-controlled-melt-growth (OCMG) method was investigated by magneto-optical (M-O) technique using an iron-garnet film with in-plane magnetization. An external magnetic field H was applied parallel to sample's c-axis (H ∥ c) up to 5000 Oe at different temperatures. The field distribution as well as the current paths were clearly visualized and correlated to the sample microstructure. The M-O images were associated with the data obtained by analysing the magnetization curves. Critical current densities were calculated from magnetization hysteresis measurements. The direct and detailed knowledge of the field behaviour provided by the M-O images allows precise interpretation of the magnetization loops.

Original languageEnglish
Pages (from-to)811-815
Number of pages5
JournalSuperconductor Science and Technology
Issue number6
Publication statusPublished - 2000 Jun 1
Externally publishedYes
EventThe 2nd International Workshop on the Processing and Applications of Superconducting (RE)CBO Large Grain Materials - Morioka, Jpn
Duration: 1999 Oct 191999 Oct 22

ASJC Scopus subject areas

  • Ceramics and Composites
  • Condensed Matter Physics
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry


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