Performance of trapped magnetic field in superconducting bulk magnets activated by pulsed field magnetization

Tetsuo Oka, H. Seki, J. Ogawa, S. Fukui, T. Sato, K. Yokoyama

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Melt-textured large grain high temperature superconducting materials have a characteristic feature so as to trap the magnetic fields applied from outside, and act as quasi- permanent magnets yielding intense magnetic fields which reach values of several T in the open space above the sample surface. The performance of the magnets has been precisely investigated when intense pulsed magnetic fields generated by feeding currents up to 9.12 kA to the pulse coil settled around a cylindrical bulk magnet. In the experiment a condenser bank with large capacitances of 40-120 mF has been adapted to apply the magnetic fields up to 8.44 T to the Gd-Ba-Cu-O-based bulk magnet with the size of 30 mm in diameter. The trapped field has reached 3.28 T on the sample surface. The magnetic fields successively penetrating the sample in the process called the IMRA method have been investigated with respect to the behavior of the magnetic flux in the sample.

Original languageEnglish
Article number5658131
Pages (from-to)3356-3359
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Volume21
Issue number3 PART 3
DOIs
Publication statusPublished - 2011 Jun 1
Externally publishedYes

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trapped magnetic fields
Magnets
Magnetization
magnets
Magnetic fields
magnetization
magnetic fields
condensers
Magnetic flux
permanent magnets
Permanent magnets
Superconducting materials
magnetic flux
Capacitance
coils
capacitance
traps
pulses
Experiments

Keywords

  • Bulk superconductor
  • Magnetic field generator
  • Refrigerator
  • Trapped field magnet

ASJC Scopus subject areas

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

Cite this

Performance of trapped magnetic field in superconducting bulk magnets activated by pulsed field magnetization. / Oka, Tetsuo; Seki, H.; Ogawa, J.; Fukui, S.; Sato, T.; Yokoyama, K.

In: IEEE Transactions on Applied Superconductivity, Vol. 21, No. 3 PART 3, 5658131, 01.06.2011, p. 3356-3359.

Research output: Contribution to journalArticle

Oka, Tetsuo ; Seki, H. ; Ogawa, J. ; Fukui, S. ; Sato, T. ; Yokoyama, K. / Performance of trapped magnetic field in superconducting bulk magnets activated by pulsed field magnetization. In: IEEE Transactions on Applied Superconductivity. 2011 ; Vol. 21, No. 3 PART 3. pp. 3356-3359.
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