Critical current density and trapped field properties of Ho-Ba-Cu-O bulk superconductors

Hironobu Tanaka, Shinya Nariki, Naomichi Sakai, Masato Murakami, Izumi Hirabayashi, Takeo Takizawa

Research output: Contribution to journalArticle

Abstract

We have fabricated melt-textured Ho-Ba-Cu-O bulk superconductors with a composition of HoBa 2Cu 3O y(Ho123) + 0.4Ho 2BaCuO 5 (Ho211) in air. Several kinds of precursor compounds having Ho211 starting powders with different sizes are prepared by calcinining Ho 2O 3, BaO 2 and CuO at 1173-1273 K. The diameter of Ho211 secondary particles dispersed in the Ho123 phase is reduced with decreasing the particle size of the Ho211 starting powder, resulting in the improvement in J c properties. The maximum J c value is 7.2 × 10 8 A/m 2 at 77 K in self-field. The Ag added large single-domain bulk of 32 mm in diameter is also fabricated. The trapped-field of 1.2 T has been achieved at 77 K for this bulk sample.

Original languageEnglish
Pages (from-to)693-697
Number of pages5
JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Volume68
Issue number9
Publication statusPublished - 2004 Sep

Fingerprint

Powders
Superconducting materials
critical current
current density
Particle size
air
Air
Chemical analysis

Keywords

  • Bulk superconductor
  • Critical current density
  • Ho BaCuO
  • HoBa Cu O
  • Melt-texturing
  • Trapped magnetic field

ASJC Scopus subject areas

  • Metals and Alloys

Cite this

Critical current density and trapped field properties of Ho-Ba-Cu-O bulk superconductors. / Tanaka, Hironobu; Nariki, Shinya; Sakai, Naomichi; Murakami, Masato; Hirabayashi, Izumi; Takizawa, Takeo.

In: Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals, Vol. 68, No. 9, 09.2004, p. 693-697.

Research output: Contribution to journalArticle

@article{430a73cfe634423087485b77ba4dbc89,
title = "Critical current density and trapped field properties of Ho-Ba-Cu-O bulk superconductors",
abstract = "We have fabricated melt-textured Ho-Ba-Cu-O bulk superconductors with a composition of HoBa 2Cu 3O y(Ho123) + 0.4Ho 2BaCuO 5 (Ho211) in air. Several kinds of precursor compounds having Ho211 starting powders with different sizes are prepared by calcinining Ho 2O 3, BaO 2 and CuO at 1173-1273 K. The diameter of Ho211 secondary particles dispersed in the Ho123 phase is reduced with decreasing the particle size of the Ho211 starting powder, resulting in the improvement in J c properties. The maximum J c value is 7.2 × 10 8 A/m 2 at 77 K in self-field. The Ag added large single-domain bulk of 32 mm in diameter is also fabricated. The trapped-field of 1.2 T has been achieved at 77 K for this bulk sample.",
keywords = "Bulk superconductor, Critical current density, Ho BaCuO, HoBa Cu O, Melt-texturing, Trapped magnetic field",
author = "Hironobu Tanaka and Shinya Nariki and Naomichi Sakai and Masato Murakami and Izumi Hirabayashi and Takeo Takizawa",
year = "2004",
month = "9",
language = "English",
volume = "68",
pages = "693--697",
journal = "Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals",
issn = "0021-4876",
publisher = "Japan Institute of Metals (JIM)",
number = "9",

}

TY - JOUR

T1 - Critical current density and trapped field properties of Ho-Ba-Cu-O bulk superconductors

AU - Tanaka, Hironobu

AU - Nariki, Shinya

AU - Sakai, Naomichi

AU - Murakami, Masato

AU - Hirabayashi, Izumi

AU - Takizawa, Takeo

PY - 2004/9

Y1 - 2004/9

N2 - We have fabricated melt-textured Ho-Ba-Cu-O bulk superconductors with a composition of HoBa 2Cu 3O y(Ho123) + 0.4Ho 2BaCuO 5 (Ho211) in air. Several kinds of precursor compounds having Ho211 starting powders with different sizes are prepared by calcinining Ho 2O 3, BaO 2 and CuO at 1173-1273 K. The diameter of Ho211 secondary particles dispersed in the Ho123 phase is reduced with decreasing the particle size of the Ho211 starting powder, resulting in the improvement in J c properties. The maximum J c value is 7.2 × 10 8 A/m 2 at 77 K in self-field. The Ag added large single-domain bulk of 32 mm in diameter is also fabricated. The trapped-field of 1.2 T has been achieved at 77 K for this bulk sample.

AB - We have fabricated melt-textured Ho-Ba-Cu-O bulk superconductors with a composition of HoBa 2Cu 3O y(Ho123) + 0.4Ho 2BaCuO 5 (Ho211) in air. Several kinds of precursor compounds having Ho211 starting powders with different sizes are prepared by calcinining Ho 2O 3, BaO 2 and CuO at 1173-1273 K. The diameter of Ho211 secondary particles dispersed in the Ho123 phase is reduced with decreasing the particle size of the Ho211 starting powder, resulting in the improvement in J c properties. The maximum J c value is 7.2 × 10 8 A/m 2 at 77 K in self-field. The Ag added large single-domain bulk of 32 mm in diameter is also fabricated. The trapped-field of 1.2 T has been achieved at 77 K for this bulk sample.

KW - Bulk superconductor

KW - Critical current density

KW - Ho BaCuO

KW - HoBa Cu O

KW - Melt-texturing

KW - Trapped magnetic field

UR - http://www.scopus.com/inward/record.url?scp=9244225686&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=9244225686&partnerID=8YFLogxK

M3 - Article

VL - 68

SP - 693

EP - 697

JO - Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals

JF - Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals

SN - 0021-4876

IS - 9

ER -