Enhancement of critical current density of Dy-Ba-Cu-O bulk superconductor by the refinement of Dy211 particles

S. Nariki, N. Sakai, M. Murakami

研究成果: Article

22 引用 (Scopus)


We have studied the relationship between the particle size of Dy2BaCuO5 (Dy211) starting powder in the precursor and the particle size of Dy211 inclusions trapped in the melt-textured bulk Dy-Ba-Cu-O. The mean diameter of Dy211 particles trapped in the DyBa2Cu3Oy could be reduced with decreasing the particle size of Dy211 starting powder. The Jc was increased with reducing the size of Dy211 secondary phase. The Jc of the bulk Dy-Ba-Cu-O sample with fine Dy211 inclusions 0.6 μm in size exhibited about 70 000 A/cm2 at 77 K and self-field. Large c-axis oriented Dy-Ba-Cu-O/Ag bulk sample could also be fabricated with the top-seeded melt-growth process in air. The trapped magnetic fields of the bulks with the diameters of 32 and 48 mm reached high values of 1.4 and 1.7 T at 77 K, respectively.

ジャーナルPhysica C: Superconductivity and its applications
発行部数SUPPL. 2
出版物ステータスPublished - 2001 8 1


ASJC Scopus subject areas

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