Recent development in superconducting permanent magnets

Uichiro Mizutani, Tetsuo Oka, Yoshitaka Itoh, Hiroshi Ikuta

Research output: Contribution to journalArticlepeer-review


The c-axis oriented single-domain Sm123 bulk superconductors have been synthesized in the melt-texturing process. The maximum trapped flux density has reached 1.7 T at 77 K and 9.0 T at 25 K at the center of sample surface. Detailed analysis on the flux motion through the pulsed field magnetization (PFM) process revealed that the iteratively magnetizing pulsed field operation with reducing amplitude (IMRA method) is very effective in magnetizing high Jc bulk superconductors at temperatures near 30 K, attained by a cryocooler and vacuum pumps. A compact superconducting permanent magnet system driven by the PFM technique has been constructed, which is capable of generating magnetic fields up to 2 T in the open space outside the magnetic pole.

Original languageEnglish
Pages (from-to)1241-1248
Number of pages8
JournalFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Issue number12
Publication statusPublished - 1999 Dec
Externally publishedYes

ASJC Scopus subject areas

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Metals and Alloys
  • Materials Chemistry


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