A 3 T magnetic field generator using melt-processed bulk superconductors as trapped field magnets and its applications

Tetsuo Oka, K. Yokoyama, Y. Itoh, Y. Yanagi, M. Yoshikawa, H. Ikuta, U. Mizutani, H. Okada, K. Noto

Research output: Contribution to journalConference article

13 Citations (Scopus)


An intense magnetic field generator yielding 3.15 T in the open space between the magnetic poles has been constructed by using a pair of melt-processed bulk superconductors as trapped field magnets. The field was measured in a 2 mm gap between the magnetic poles set face-to-face after the pulsed-field magnetization "IMRA" method. This field generator is composed of Sm-based 123 compounds, vacuum pumps, pulsed-field coils and GM refrigerators with compressors. The system can be used in various applications. We investigated, for instance, the application to a high gradient magnetic separation system. It was found that the alpha hematite fine particles mixed in the flowing water was completely removed by this technique which was operated in the field of 1.7 T in the gap of 20 mm.

Original languageEnglish
Pages (from-to)709-712
Number of pages4
JournalPhysica C: Superconductivity and its Applications
Issue numberPART 1
Publication statusPublished - 2003 Oct 1
Externally publishedYes
EventProceedings of the 15th International Symposium on Superconduc - Yokohama, Japan
Duration: 2002 Nov 112002 Nov 13



  • Field generator
  • Magnetic separation
  • Pulsed field magnetization
  • Trapped field magnet

ASJC Scopus subject areas

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

Cite this