Construction of a 2-5 T class superconducting magnetic field generator with use of an Sm123 bulk superconductor and its application to high-magnetic field demanding devices

Tetsuo Oka, Y. Itoh, Y. Yanagi, M. Yoshikawa, H. Ikuta, U. Mizutani

Research output: Contribution to journalConference article

56 Citations (Scopus)


Superconducting permanent magnet systems generating magnetic fields of 2-5 T have been constructed for the first time in the world by c-axis oriented Sm-Ba-Cu-O bulk superconductors fabricated through the melt processing as trapped field magnets. The trapped magnetic fields of 3.8 and 6.7 T have been produced on the bulk surface at 30 K by the pulsed field magnetization (PFM) and field cooling (FC) methods, respectively. The magnetic field in the open space outside the vacuum vessel exceeds 2.0 and 3.2 T when magnetized by the PFM and FC modes, respectively. It was found that the iteratively magnetizing pulsed-field operation with reducing amplitudes (IMRA method) is very effective in magnetizing high Jc bulk superconductors. This implies the superconducting permanent magnets can be used as high magnetic field generators in various practical applications.

Original languageEnglish
Pages (from-to)101-106
Number of pages6
JournalPhysica C: Superconductivity and its Applications
Issue number1
Publication statusPublished - 2000 Jan 1
Externally publishedYes
Event9th Japan-US Workshop on High-Tc Superconductors - Yamanashi, Jpn
Duration: 1999 Oct 131999 Oct 15


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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