Superconducting properties of (Nd, Eu, Gd)-123

研究成果: Article

2 引用 (Scopus)

抄録

In the aim of optimizing the matrix composition to improve the critical current density (Jc) and to strengthen the flux pinning in the (Nd0.33Eu0.33Gd0.33) Ba2Cu3Oy (NEG) bulk superconductors, we prepared two groups of NEG samples using a oxygen controlled melt growth process. For the first group we kept the Nd content constant and varied the Eu and Gd ratio, and for the second group the Gd content was kept constant and the Nd and Eu content was varied. In both cases we found a strongly developed fishtail effect and high critical current densities. Magnetization measurements revealed that, the irreversibility field and the peak position systematically varied with Nd content. However it was not systematic for Gd. The sample with Gd = 0.58 exhibited a large critical current density (Jc) of 90000 A cm-2 at 77 K and 1.7 T.

元の言語English
ジャーナルPhysica C: Superconductivity and its Applications
341-348
DOI
出版物ステータスPublished - 2000 11
外部発表Yes

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Flux pinning
Superconducting materials
Magnetization
Oxygen
critical current
current density
Chemical analysis
flux pinning
magnetization
oxygen
matrices

ASJC Scopus subject areas

  • Condensed Matter Physics

これを引用

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abstract = "In the aim of optimizing the matrix composition to improve the critical current density (Jc) and to strengthen the flux pinning in the (Nd0.33Eu0.33Gd0.33) Ba2Cu3Oy (NEG) bulk superconductors, we prepared two groups of NEG samples using a oxygen controlled melt growth process. For the first group we kept the Nd content constant and varied the Eu and Gd ratio, and for the second group the Gd content was kept constant and the Nd and Eu content was varied. In both cases we found a strongly developed fishtail effect and high critical current densities. Magnetization measurements revealed that, the irreversibility field and the peak position systematically varied with Nd content. However it was not systematic for Gd. The sample with Gd = 0.58 exhibited a large critical current density (Jc) of 90000 A cm-2 at 77 K and 1.7 T.",
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