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We report on the embedding of insulating 211 particles into ternary 123 superconductors of the type (Nd0.33Eu0.33Gd0.33)Ba2Cu3Oy (NEG). It is found that the externally added 211 particles can act as nucleation sites in order to control the 211 particle size and distribution. As the composition of the added 211 particles also affects the superconducting NEG matrix, we varied the composition of the light rare earth (LRE) elements within the 211 particles while keeping the composition of NEG and the oxygenation procedure constant. Measurements of magnetization loops reveal that the position of the secondary peak can be shifted towards higher values on increasing the Gd content within the 211 particles, whereas the nominal largest Jc values are achieved in the sample with an even LRE ratio. From a pinning force scaling analysis, we find that the peak in the pinning force diagrams can be shifted even up to 0.53, which indicates a further strengthening of the δTc-pinning mechanism.

元の言語English
ページ(範囲)555-562
ページ数8
ジャーナルSuperconductor Science and Technology
12
発行部数8
DOI
出版物ステータスPublished - 1999 8 1

ASJC Scopus subject areas

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

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