Effect of metal impregnation in the field cool magnetization of bulk superconductor

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

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Gd-Ba-Cu-O bulk superconductors have significant potential for various applications due to the high critical current density and the highly trapped magnetic fields. Recently we have developed a large sized bulk superconductor using Gd210, which is discovered in the microgravity experiment. We investigated the mechanical properties and the cryostability of the Gd-Ba-Cu-O bulk superconductor to determine how to improve toughness and heat conduction of the large sized bulk superconductor. We introduced a stainless ring around the circumference of the bulk to increase the fracture strength of the bulk. Also, we introduced Al wires inserted in the hole along the c-axis of the bulk, and then the sample was subjected to the impregnation by using Bi-Sn-Cd alloy. We measured the trapped magnetic fields and the repulsive forces of the samples. The trapped magnetic field distributions were 1.13-1.36 T. The repulsive forces at 1 mm gap between the sample bulk and the permanent magnet with the surface magnetic induction of 0.37 T were about 70 N at 77 K. We have also measured the temperature dependence of the trapped magnetic field, and confirmed the effect of metal impregnation.

Original languageEnglish
Pages (from-to)375-378
Number of pages4
JournalPhysica C: Superconductivity and its applications
Volume445-448
Issue number1-2
DOIs
Publication statusPublished - 2006 Oct 1
Externally publishedYes

Fingerprint

trapped magnetic fields
Impregnation
Superconducting materials
Magnetization
Metals
Magnetic fields
magnetization
metals
Electromagnetic induction
circumferences
magnetic induction
Microgravity
toughness
microgravity
fracture strength
permanent magnets
Heat conduction
conductive heat transfer
Permanent magnets
Toughness

Keywords

  • Gd-Ba-Cu-O
  • Magnetic levitation force
  • Metal impregnation
  • Trapped magnetic field

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

Cite this

Effect of metal impregnation in the field cool magnetization of bulk superconductor. / Kita, M.; Nariki, S.; Sakai, Naomichi; Hirabayashi, I.

In: Physica C: Superconductivity and its applications, Vol. 445-448, No. 1-2, 01.10.2006, p. 375-378.

Research output: Contribution to journalArticle

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