Pulsed field magnetization characteristics of a holed superconducting bulk magnet

K. Yokoyama, R. Igarashi, R. Togasaki, T. Oka

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


We have proposed a holed superconducting bulk magnet to trap the magnetic field efficiently in the high-performance material excited by pulsed field magnetization. Previously, a single pulsed field was applied with varying amplitudes of the magnetic fields and temperatures to a GdBCO bulk material with four 2-mm-diameter holes, and the time responses of flux density on the bulk surface and trapped field distributions were measured. The experimental results suggested that the number of holes was too high because a large distortion appeared in the trapped field distributions. In this paper, we processed only a single hole with a different hole size and investigated the magnetization characteristics. After estimating the trapped field performance by applying a single pulsed field with varying its amplitude and temperature in the original material, a 1-mm-diameter hole was drilled; then the hole was extended to 2 mm in diameter, and the same experiments were carried out in each sample. A total magnetic flux of both 1-mm-diameter hole and 2-mm-diameter hole samples was about 10 percent higher than that of a four-hole sample at a low temperature. On the other hand, the value of a 2-mm-diameter hole sample was the same as that of a four-hole sample at a high temperature. The experimental results suggested that about 1 mm in diameter was proper for the hole size.

Original languageEnglish
Pages (from-to)117-121
Number of pages5
JournalPhysica C: Superconductivity and its applications
Publication statusPublished - 2015 Jun 25
Externally publishedYes


  • Flux jump
  • Pulsed field magnetization
  • Small hole
  • Superconducting bulk magnet
  • Total magnetic flux

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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