Microstructure and superconducting properties of Dy-Ba-Cu-O bulk superconductors fabricated in different oxygen atmospheres

H. Tanaka, S. Nariki, Naomichi Sakai, I. Hirabayashi, Masato Murakami, T. Takizawa

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Abstract

We have investigated the effect of microstructure and superconducting properties of melt-textured Dy-Ba-Cu-O bulk superconductors on various oxygen partial pressures in melt processing. The c-axis-oriented Dy-Ba-Cu-O bulk superconductors are melt textured in 1% O2-Ar, air and pure O 2. It is found that the distribution of voids in the microstructure depends on oxygen pressures. The number of voids decreases in a sample fabricated in O2. The peak effect is observed in Jc-B curves of these samples except for the sample fabricated in 1% O2. Such behavior is similar to those found in Nd- and Sm-Ba-Cu-O. These results indicate the possibility of the Dy/Ba substitution.

Original languageEnglish
Pages (from-to)660-665
Number of pages6
JournalPhysica C: Superconductivity and its Applications
Volume426-431
Issue numberI
DOIs
Publication statusPublished - 2005 Oct 1

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Keywords

  • Bulk superconductor
  • Dy-Ba-Cu-O
  • Melt processing
  • Microstructure

ASJC Scopus subject areas

  • Condensed Matter Physics

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