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

Y. Kimura, H. Matsumoto, H. Fukai, Naomichi Sakai, I. Hirabayashi, M. Izumi, Masato 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

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Impregnation
Superconducting materials
Magnetization
magnetization
Thermal conductivity
thermal conductivity
thermocouples
Thermocouples
Aluminum
Magnets
magnets
trapping
wire
Wire
Magnetic fields
aluminum
Fabrication
Temperature
fabrication
temperature

Keywords

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

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Pulsed field magnetization properties for Gd-Ba-Cu-O superconductors impregnated with Bi-Sn-Cd alloy. / Kimura, Y.; Matsumoto, H.; Fukai, H.; Sakai, Naomichi; Hirabayashi, I.; Izumi, M.; Murakami, Masato.

In: Physica C: Superconductivity and its Applications, Vol. 445-448, No. 1-2, 01.10.2006, p. 408-411.

Research output: Contribution to journalArticle

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AU - Sakai, Naomichi

AU - Hirabayashi, I.

AU - Izumi, M.

AU - Murakami, Masato

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N2 - 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.

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