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

393 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
JournalJapanese Journal of Applied Physics, Part 2: Letters
Volume33
Issue number5 B
Publication statusPublished - 1994
Externally publishedYes

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Flux pinning
flux pinning
Rare earths
Superconducting materials
rare earth elements
Solid solutions
solid solutions
Critical current density (superconductivity)
critical current
inclusions
current density
atmospheres
Oxygen
radii
Ions
oxygen
matrices
ions

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Flux pinning in melt-grown NdBa2Cu3Oy and SmBa2Cu3Oy superconductors. / Murakami, Masato; Yoo, Sang Im; Higuchi, Takamitsu; Sakai, Naomichi; Weltz, Jurgen; Koshizuka, Naoki; Tanaka, Shoji.

In: Japanese Journal of Applied Physics, Part 2: Letters, Vol. 33, No. 5 B, 1994.

Research output: Contribution to journalArticle

Murakami, Masato ; Yoo, Sang Im ; Higuchi, Takamitsu ; Sakai, Naomichi ; Weltz, Jurgen ; Koshizuka, Naoki ; Tanaka, Shoji. / Flux pinning in melt-grown NdBa2Cu3Oy and SmBa2Cu3Oy superconductors. In: Japanese Journal of Applied Physics, Part 2: Letters. 1994 ; Vol. 33, No. 5 B.
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AU - Koshizuka, Naoki

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