Development of a small-size superconducting bulk magnet system using a 13 K refrigerator

K. Yokoyama, T. Oka, K. Noto

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


We developed a small-superconducting bulk magnet system using a 13 K refrigerator. The industrial applications of bulk magnets demand the miniaturization of the magnet apparatus as well as the enhancement of the magnetic field. A Gifford-McMahon cycle helium refrigerator with the ultimate temperature of 13 K at the 2nd stage was adopted, and a GdBa2Cu 3O7-x bulk material of 60 mm diameter and 20 mm thickness reinforced by a stainless steel ring was located on a cold stage. When a magnetic field of 7.74 T was applied, the trapped field reached 2.76 T, which is the highest ever reported for a pulsed-field magnetization of φ60 mm class bulk material.

Original languageEnglish
Article number5433295
Pages (from-to)973-976
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Issue number3
Publication statusPublished - 2010 Jun
Externally publishedYes


  • Magnetic field distribution
  • Magnetic separation
  • Pulsed-field magnetization
  • Superconducting bulk magnet

ASJC Scopus subject areas

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


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