Barium cerate as effective flux pinning centers in Y123 bulk materials

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

研究成果: Article

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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.

元の言語English
ページ(範囲)602-607
ページ数6
ジャーナルPhysica C: Superconductivity and its Applications
426-431
発行部数I
DOI
出版物ステータスPublished - 2005 10 1

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ASJC Scopus subject areas

  • Condensed Matter Physics

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