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

doi:10.2320/jinstmet.68.693

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 journal › Article › peer-review

Abstract

We have fabricated melt-textured Ho-Ba-Cu-O bulk superconductors with a composition of HoBa₂Cu₃O_y(Ho123) + 0.4Ho ₂BaCuO₅ (Ho211) in air. Several kinds of precursor compounds having Ho211 starting powders with different sizes are prepared by calcinining Ho₂O₃, BaO₂ 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 × 10⁸ A/m² 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 language	English
Pages (from-to)	693-697
Number of pages	5
Journal	Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Volume	68
Issue number	9
DOIs	https://doi.org/10.2320/jinstmet.68.693
Publication status	Published - 2004 Sept

Keywords

Bulk superconductor
Critical current density
Melt-texturing
Trapped magnetic field

ASJC Scopus subject areas

Condensed Matter Physics
Mechanics of Materials
Metals and Alloys
Materials Chemistry

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@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 HoBa2Cu3Oy(Ho123) + 0.4Ho 2BaCuO5 (Ho211) in air. Several kinds of precursor compounds having Ho211 starting powders with different sizes are prepared by calcinining Ho2O3, BaO2 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 Jc properties. The maximum J c value is 7.2 × 108 A/m2 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, 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 = sep,

doi = "10.2320/jinstmet.68.693",

language = "English",

volume = "68",

pages = "693--697",

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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 HoBa2Cu3Oy(Ho123) + 0.4Ho 2BaCuO5 (Ho211) in air. Several kinds of precursor compounds having Ho211 starting powders with different sizes are prepared by calcinining Ho2O3, BaO2 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 Jc properties. The maximum J c value is 7.2 × 108 A/m2 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 HoBa2Cu3Oy(Ho123) + 0.4Ho 2BaCuO5 (Ho211) in air. Several kinds of precursor compounds having Ho211 starting powders with different sizes are prepared by calcinining Ho2O3, BaO2 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 Jc properties. The maximum J c value is 7.2 × 108 A/m2 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 - Melt-texturing

KW - Trapped magnetic field

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IS - 9

ER -

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

Abstract

Keywords

ASJC Scopus subject areas

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