Pulsed-field magnetization applied to high-Tc superconductors

U. Mizutani, Tetsuo Oka, Y. Itoh, Y. Yanagi, M. Yoshikawa, H. Ikuta

Research output: Contribution to journalArticle

100 Citations (Scopus)

Abstract

The pulsed-field magnetization (PFM) technique has been elaborated as the most efficient and effective tool in magnetizing the melt-processed high-Tc bulk superconductor in the temperature range 30-80 K. The dynamic motion of magnetic fluxes penetrating into the YBCO superconductor during the PFM operation has been analyzed and the flux propagation speed has been accurately evaluated. The viscous force is found to play a very crucial role in the PFM process. Detailed analysis of the flux motion in the presence of both viscous and pinning forces enabled us to find a very efficient method for magnetization by the PFM operation. The iteratively magnetizing pulsed field operation with reducing amplitudes abbreviated as 'IMRA' has been developed and proved to be very effective in magnetizing high-Tc superconductors at temperatures as low as 30 K. By making full use of these findings, we constructed a prototype quasi-permanent magnet system capable of producing magnetic field of 0.8 T in the outerspace at 7 mm above the surface of the magnetized YBCO superconductor.

Original languageEnglish
Pages (from-to)235-246
Number of pages12
JournalApplied Superconductivity
Volume6
Issue number2-5
DOIs
Publication statusPublished - 1998 Jan 1
Externally publishedYes

Fingerprint

Superconducting materials
Magnetization
magnetization
YBCO superconductors
Fluxes
Magnetic flux
permanent magnets
Permanent magnets
magnetic flux
prototypes
Magnetic fields
Temperature
temperature
propagation
magnetic fields

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

Pulsed-field magnetization applied to high-Tc superconductors. / Mizutani, U.; Oka, Tetsuo; Itoh, Y.; Yanagi, Y.; Yoshikawa, M.; Ikuta, H.

In: Applied Superconductivity, Vol. 6, No. 2-5, 01.01.1998, p. 235-246.

Research output: Contribution to journalArticle

Mizutani, U, Oka, T, Itoh, Y, Yanagi, Y, Yoshikawa, M & Ikuta, H 1998, 'Pulsed-field magnetization applied to high-Tc superconductors', Applied Superconductivity, vol. 6, no. 2-5, pp. 235-246. https://doi.org/10.1016/S0964-1807(98)00106-9
Mizutani, U. ; Oka, Tetsuo ; Itoh, Y. ; Yanagi, Y. ; Yoshikawa, M. ; Ikuta, H. / Pulsed-field magnetization applied to high-Tc superconductors. In: Applied Superconductivity. 1998 ; Vol. 6, No. 2-5. pp. 235-246.
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