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

Research output: Contribution to journalArticle

15 Citations (Scopus)

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

Fingerprint

Superconducting materials
Oxygen
atmospheres
microstructure
Microstructure
voids
oxygen
Partial pressure
Substitution reactions
partial pressure
Processing
Air
substitutes
air
curves

Keywords

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

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Microstructure and superconducting properties of Dy-Ba-Cu-O bulk superconductors fabricated in different oxygen atmospheres. / Tanaka, H.; Nariki, S.; Sakai, Naomichi; Hirabayashi, I.; Murakami, Masato; Takizawa, T.

In: Physica C: Superconductivity and its Applications, Vol. 426-431, No. I, 01.10.2005, p. 660-665.

Research output: Contribution to journalArticle

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AU - Murakami, Masato

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