Recovery of trapped field distribution around a growth sector in a Gd-Ba-Cu-O HTS bulk with pulsed-field magnetization

Y. Kimura, H. Matsuzaki, I. Ohtani, E. Morita, M. Izumi, Naomichi Sakai, I. Hirabayashi, M. Miki, M. Kitano, T. Ida

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Pulsed-field magnetization is a useful magnetization technique for high-temperature superconductivity bulk crystals for practical applications. However, the trapped magnetic flux is reduced due to the temperature increase from the mobile flux, and the distribution of the flux density is considerably distorted in the a-b crystallographic axes plane. We present two proposals to improve the trapped magnetic flux and its distribution upon pulsed-field magnetization. Firstly, split-type vortex pulsed copper coils with diameters smaller than that of the bulk disk. Secondly, two HTS bulks are stacked layered with misalignment of their crystal a-b axes to reduce the flux motion in the four-fold growth sectors, since the critical current density Jc in the growth sectors is lower. Combining these techniques, the decayed trapped field distribution was recovered and the total flux was increased up to 30% in comparison with a conventional pulsed-field magnetization.

Original languageEnglish
JournalSuperconductor Science and Technology
Volume19
Issue number7
DOIs
Publication statusPublished - 2006 Jul 1
Externally publishedYes

Fingerprint

Magnetization
sectors
recovery
Fluxes
Recovery
magnetization
Magnetic flux
magnetic flux
Crystals
Superconductivity
misalignment
crystals
proposals
Copper
critical current
Vortex flow
coils
superconductivity
flux density
vortices

ASJC Scopus subject areas

  • Ceramics and Composites
  • Condensed Matter Physics
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

Cite this

Recovery of trapped field distribution around a growth sector in a Gd-Ba-Cu-O HTS bulk with pulsed-field magnetization. / Kimura, Y.; Matsuzaki, H.; Ohtani, I.; Morita, E.; Izumi, M.; Sakai, Naomichi; Hirabayashi, I.; Miki, M.; Kitano, M.; Ida, T.

In: Superconductor Science and Technology, Vol. 19, No. 7, 01.07.2006.

Research output: Contribution to journalArticle

Kimura, Y. ; Matsuzaki, H. ; Ohtani, I. ; Morita, E. ; Izumi, M. ; Sakai, Naomichi ; Hirabayashi, I. ; Miki, M. ; Kitano, M. ; Ida, T. / Recovery of trapped field distribution around a growth sector in a Gd-Ba-Cu-O HTS bulk with pulsed-field magnetization. In: Superconductor Science and Technology. 2006 ; Vol. 19, No. 7.
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AU - Morita, E.

AU - Izumi, M.

AU - Sakai, Naomichi

AU - Hirabayashi, I.

AU - Miki, M.

AU - Kitano, M.

AU - Ida, T.

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