High critical current density in RE-Ba-Cu-O bulk superconductors with very fine RE2BaCuO5 particles

S. Nariki, N. Sakai, M. Murakami, I. Hirabayashi

研究成果: Article査読

58 被引用数 (Scopus)

抄録

We have studied the microstructure and critical current density (J c) of Gd-Ba-Cu-O and Y-Ba-Cu-O bulk superconductors. The size of RE2BaCuO5 (RE211) particles trapped in REBa 2Cu3Oy (RE123) matrix could be refined by employing ultra-fine RE211 powder as a precursor, which led to high J c values exceeding 1 × 105 A/cm2 at 77 K in self-field for Gd-Ba-Cu-O. In the case of Y-Ba-Cu-O, however, the size reduction of Y211 led to inhomogeneous distribution of Y211 particles, in that the volume fraction of Y211 phase largely decreased near a seed crystal. We also studied superconducting properties of (Gd,Y)-Ba-Cu-O bulk material fabricated from precursor of Gd123-Y211. The employment of finely-milled Y211 powders resulted in a dramatic enhancement of Jc values in this system. The maximum Jc value for (Gd,Y)-Ba-Cu-O reached 2.5×105 A/cm2 at 77 K.

本文言語English
ページ(範囲)557-565
ページ数9
ジャーナルPhysica C: Superconductivity and its applications
412-414
SPEC. ISS.
DOI
出版ステータスPublished - 2004 10

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • エネルギー工学および電力技術
  • 電子工学および電気工学

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