Barium cerate as effective flux pinning centers in Y123 bulk materials

S. Nariki, Naomichi Sakai, Masato Murakami, I. Hirabayashi

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Bulk superconductors with compositions of YBa2Cu 3Oy + xBaCeO3 (x = 0.05-0.5) and 0.5 wt.% Pt were fabricated by melt processing in air. BaCeO3 particles of 1-2 μm diameter were dispersed in the Y123 matrix, and critical current density (Jc) increased with the amount of BaCeO3 for the sample with x = 0.05-0.3. We also found that the size of BaCeO3 particles could be reduced by substituting Zr on Ce site. The Y123 bulk sample with 30 mol% of Ba(Ce0.75, Zr0.25)O3 and 0.5 wt.% Pt showed a high Jc value of 110 kA/cm2 at 77 K, where the Ba(Ce, Zr)O3 inclusions were reduced to less than 1 μm in size. However, excess substitution of Zr led to inhomogeneous distribution of the additives and lowered Jc values.

Original languageEnglish
Pages (from-to)602-607
Number of pages6
JournalPhysica C: Superconductivity and its Applications
Volume426-431
Issue numberI
DOIs
Publication statusPublished - 2005 Oct 1

Fingerprint

Flux pinning
flux pinning
Barium
Superconducting materials
barium
Substitution reactions
Processing
Air
Chemical analysis
critical current
inclusions
substitutes
current density
air
matrices

Keywords

  • BaCeO
  • Critical current density
  • Melt-textured bulk
  • Microstructure
  • Y-Ba-Cu-O

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Barium cerate as effective flux pinning centers in Y123 bulk materials. / Nariki, S.; Sakai, Naomichi; Murakami, Masato; Hirabayashi, I.

In: Physica C: Superconductivity and its Applications, Vol. 426-431, No. I, 01.10.2005, p. 602-607.

Research output: Contribution to journalArticle

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AU - Sakai, Naomichi

AU - Murakami, Masato

AU - Hirabayashi, I.

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AB - Bulk superconductors with compositions of YBa2Cu 3Oy + xBaCeO3 (x = 0.05-0.5) and 0.5 wt.% Pt were fabricated by melt processing in air. BaCeO3 particles of 1-2 μm diameter were dispersed in the Y123 matrix, and critical current density (Jc) increased with the amount of BaCeO3 for the sample with x = 0.05-0.3. We also found that the size of BaCeO3 particles could be reduced by substituting Zr on Ce site. The Y123 bulk sample with 30 mol% of Ba(Ce0.75, Zr0.25)O3 and 0.5 wt.% Pt showed a high Jc value of 110 kA/cm2 at 77 K, where the Ba(Ce, Zr)O3 inclusions were reduced to less than 1 μm in size. However, excess substitution of Zr led to inhomogeneous distribution of the additives and lowered Jc values.

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