Pulsed field magnetization properties for Gd-Ba-Cu-O superconductors impregnated with Bi-Sn-Cd alloy

Y. Kimura, H. Matsumoto, H. Fukai, N. Sakai, I. Hirabayashi, M. Izumi, M. Murakami

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

We present a post-fabrication treatment that improves thermal conductivity of bulk Gd-Ba-Cu-O magnets for pulsed field magnetization (PFM). A small hole about 1 mm in diameter was artificially drilled into the center of bulk Gd-Ba-Cu-O 25 mm in diameter and 18 mm in thickness. An aluminum wire was inserted into the hole, and then the sample was subjected to the impregnation by using Bi-Sn-Cd alloy. We employed PFM to magnetize Gd-Ba-Cu-O bulk superconductors with and without the alloy impregnation treatment. The temperatures of the samples were monitored with thermocouples, and local magnetic field density was measured with a Hall sensor. It was found that the alloy impregnation was effective in suppressing the temperature rise by 4 K and in increasing the trapped field by 25% at 44 K. The present results show that the alloy impregnation treatment enhanced the thermal conductivity of bulk Gd-Ba-Cu-O, and thereby improved the field trapping ability.

Original languageEnglish
Pages (from-to)408-411
Number of pages4
JournalPhysica C: Superconductivity and its applications
Volume445-448
Issue number1-2
DOIs
Publication statusPublished - 2006 Oct 1

Keywords

  • Gd-Ba-Cu-O
  • Impregnation
  • Pulsed field magnetization

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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