Melt processing and enhanced superconducting properties of single domain (Sm0.5Eu0.5)123 superconductors fabricated in air

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High-quality single domain (Sm0.5Eu0.5)Ba2Cu3O7-δ superconductors were grown in air with a thermal gradient. We found that the substitution of Ba by rare earth (RE) elements was considerably suppressed when the growth rate is large. Enhanced superconducting properties were obtained by further controlling initial compositions and combining a post-annealing in Ar. The crystals exhibited a high Tc value of 95 K with a sharp superconducting transition, and a well-developed secondary peak effect in the Jc-B curve at 77 K. TEM observation revealed that the nano-sized chemical variation between RE and Ba provided robust flux pinning.

元の言語English
ページ(範囲)675-678
ページ数4
ジャーナルSuperconductor Science and Technology
15
発行部数5
DOI
出版物ステータスPublished - 2002 5 1

ASJC Scopus subject areas

  • Ceramics and Composites
  • Condensed Matter Physics
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

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