Improvement of thermal stability with alloy impregnation in Gd-Ba-Cu-O superconductors for pulsed field magnetization

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

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We present a post-fabrication treatment that improves thermal conductivity of bulk Gd-Ba-Cu-O magnets. A small hole about 1 mm in diameter was artificially drilled into the centre of bulk Gd-Ba-Cu-O 25 mm in diameter and 18 mm in thickness. An aluminium wire was inserted into the hole, and then the sample was subjected to the impregnation by using Bi- Su-Cd alloy. A pulsed-field magnetization was performed for Gd-Ba-Cu-O bulk with and without the alloy impregnation treatment. The temperature of samples was monitored with thermocouples and local magnetic field density was measured with a Hall sensor at several positions. The maximum temperature rise was depressed by 4 K and the trapped field was increased by 25 % at 44 K. The result shows that the alloy impregnation is very effective in enhancing the thermal conductivity and thereby improving the field trapping ability.

Original languageEnglish
Article number097
Pages (from-to)389-392
Number of pages4
JournalJournal of Physics: Conference Series
Volume43
Issue number1
DOIs
Publication statusPublished - 2006 Jun 1

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thermal stability
magnetization
thermal conductivity
thermocouples
magnets
trapping
wire
aluminum
fabrication
temperature
sensors
magnetic fields

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Improvement of thermal stability with alloy impregnation in Gd-Ba-Cu-O superconductors for pulsed field magnetization. / Kimura, Y.; Matsumoto, H.; Fukai, H.; Sakai, Naomichi; Hirabayashi, I.; Izumi, M.; Murakami, Masato.

In: Journal of Physics: Conference Series, Vol. 43, No. 1, 097, 01.06.2006, p. 389-392.

Research output: Contribution to journalArticle

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AU - Murakami, Masato

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