Characteristics of metal impregnated bulk Gd-Ba-Cu-O superconductors cooled down in a magnetic field

M. Kita, S. Nariki, Naomichi Sakai, I. Hirabayashi

Research output: Contribution to journalArticle

Abstract

Gd-Ba-Cu-O bulk superconductors have significant potential for various applications due to their high critical current density and high trapped magnetic field. We investigated the mechanical properties and cryostability of a Gd-Ba-Cu-O bulk superconductor. Increasing the toughness of the bulk and improvement of the heat conduction are both important for enhancing the trapped magnetic field. We introduced a stainless steel ring around the circumference of the bulk to increase the strength of the bulk. Also, we introduced Al wires inserted in the holes along the c-axis of the bulk, after which the sample was impregnated with Bi-Sn-Cd alloy. At T ≤ 77 K, starting from B ≤ 3 T, the 14 mm thick and 44 mm diameter samples were able to trap a flux density of 1.13-1.36 T. The repulsive force between the superconductor sample bulk and a permanent magnet with a surface magnetic induction of 0.37 T was about 70 N for a 1 mm gap. We also measured the temperature rise of the bulk superconductor surface, at various temperatures, when the external field went down from B ≤ 9 to 0 T.

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

Fingerprint

Superconducting materials
Metals
trapped magnetic fields
Magnetic fields
magnetic fields
metals
Electromagnetic induction
circumferences
magnetic induction
Stainless Steel
toughness
permanent magnets
Heat conduction
conductive heat transfer
Permanent magnets
Toughness
stainless steels
critical current
Stainless steel
flux density

ASJC Scopus subject areas

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

Cite this

Characteristics of metal impregnated bulk Gd-Ba-Cu-O superconductors cooled down in a magnetic field. / Kita, M.; Nariki, S.; Sakai, Naomichi; Hirabayashi, I.

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

Research output: Contribution to journalArticle

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