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

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

Research output: Contribution to journalArticlepeer-review

59 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)557-565
Number of pages9
JournalPhysica C: Superconductivity and its applications
Issue numberSPEC. ISS.
Publication statusPublished - 2004 Oct


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

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


Dive into the research topics of 'High critical current density in RE-Ba-Cu-O bulk superconductors with very fine RE<sub>2</sub>BaCuO<sub>5</sub> particles'. Together they form a unique fingerprint.

Cite this