Magnetic field distribution of permanent magnet magnetized by static magnetic field generated by HTS bulk magnet

Tetsuo Oka, Nobutaka Kawasaki, Satoshi Fukui, Jun Ogawa, Takao Sato, Toshihisa Terasawa, Yoshitaka Itoh, Ryohei Yabuno

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Demagnetized rare earth magnets (Nd-Fe-B) can be fully magnetized by scanning them in the intense static fields over 3 T of a HTS bulk magnet which was cooled to the temperature range lower than 77K with use of cryo-coolers and activated by the field of 5 T. We precisely examined the magnetic field distributions of magnetized permanent magnets. The magnetic poles were in the narrow space on the surface of the permanent magnet with varying gap distances between the tracks of the HTS magnetic pole. Steep magnetic transitions between N and S were observed in the magnetic field distribution maps after the HTS magnetic poles were alternatively scanned for several times. The magnetizing method has been proposed for designing novel electromagnetic devices including magnetically excellent rare earth magnets which require intense magnetic fields over 3 T.

Original languageEnglish
Article number6101562
JournalIEEE Transactions on Applied Superconductivity
Volume22
Issue number3
DOIs
Publication statusPublished - 2012 Jun 25

Keywords

  • Bulk superconductor
  • magnetic field
  • permanent magnet
  • refrigerator
  • trapped field

ASJC Scopus subject areas

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

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