Superconducting properties of Dy-Ba-Cu-O bulk superconductors

S. Nariki, M. Murakami

研究成果: Article査読

42 被引用数 (Scopus)


We report on the superconducting properties of melt-textured Dy 123 bulk superconductors containing 5 to 40 mol% Dy211. Dy-Ba-Cu-O bulk samples were fabricated with the cold-seeding method in air using a Nd123 seed crystal. The superconducting properties of the bulk samples were strongly affected by the Dy211 content and the oxygen-annealing temperature. In the Jc-B curve of the Dy123 sample with 5 mol% of Dy211, the secondary peak was clearly observed at the applied fields of 0.5-2.0 T. The peak Jc values were 32 000-37 000 A cm-2 at 77 K. The peak position shifted to lower fields with increasing oxygen-annealing temperature, presumably due to an increase in oxygen vacancies. We believe that the peak effect in Dy-Ba-Cu-O is ascribed to oxygen deficiency, since RE/Ba substitution is not present in the system. This idea was supported by the fact that the secondary peak decreased with increasing Dy211 contents and disappeared in the Dy123 sample with 40 mol% of Dy211.

ジャーナルSuperconductor Science and Technology
出版ステータスPublished - 2002 5月 1

ASJC Scopus subject areas

  • セラミックおよび複合材料
  • 凝縮系物理学
  • 金属および合金
  • 電子工学および電気工学
  • 材料化学


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