Flux pinning in melt-grown NdBa2Cu3Oy and SmBa2Cu3Oy superconductors

Masato Murakami, Sang Im Yoo, Takamitsu Higuchi, Naomichi Sakai, Jurgen Weltz, Naoki Koshizuka, Shoji Tanaka

Research output: Contribution to journalArticle

395 Citations (Scopus)

Abstract

REBa2Cu3Oy superconductors with rare earth (RE) ions with large radii (RE: La, Nd, Sm) exhibit relatively low Tc due to the presence of RE-Ba solid solution. We have found that this solid solution can be suppressed if these superconductors are melt processed in a reduced oxygen atmosphere. We have also found that critical current densities of these superconductors are higher than those of melt processed YBa2Cu3Oy with fine Y2BaCuO5 inclusions in a high field region. The irreversibility line was also shifted toward the higher H-T region. We believe that flux pinning in these superconductors is ascribable to a finely distributed RE(Ba1–x, REx)2Cu3Oy phase in a good superconductive matrix.

Original languageEnglish
Pages (from-to)L715-L717
JournalJapanese Journal of Applied Physics
Volume33
Issue number5
DOIs
Publication statusPublished - 1994 May

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Keywords

  • Critical current density
  • Flux pinning
  • Irreversibility field
  • Melt process
  • NdBaCuO
  • Oxygen partial pressure
  • SmBaCuO
  • Solid solution

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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