Proposal of Magnetic Circuit using Magnetic Shielding with Bulk-Type High Tc Superconductors —Evaluation of Magnetic Circuit using Toroidal Core—

Katsuhiro Fukuoka, Mitsuo Hashimoto, Masaru Tomita, Masato Murakami

Research output: Contribution to journalArticle

1 Citation (Scopus)


Recently, bulk-type high Tc having a characteristic of critical current density over 104 A/cm2 in liquid nitrogen temperature (77K) on 1T, can be produced. They are promising for many practical applications such as a magnetic bearing, a magnetic levitation, a flywheel, a magnetic shielding and others. In this research, we propose a magnetic circuit that is able to use for the magnetic shield of plural superconductors as an application of bulk-type high Tc superconductors. It is a closed magnetic circuit by means of a toroidal core. Characteristics of the magnetic circuit surrounded with superconductors are evaluated and the possibility is examined. As the magnetic circuit of the ferrite core is surrounded with superconductors, the magnetic flux is shielded even if it leaked from the ferrite core.

Original languageEnglish
Pages (from-to)554-561
Number of pages8
JournalIEEJ Transactions on Fundamentals and Materials
Issue number6
Publication statusPublished - 2003 Jan 1



  • Bulk-type high T superconductor
  • leakagre flux
  • magnetic circuit
  • magnetic shielding

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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