Effect of Eu2BaCuO5 addition on the matrix composition and flux pinning in (Nd0.33Eu0.33Gd0.33)Ba2Cu3Oy superconductors

研究成果: Article

6 引用 (Scopus)

抄録

We have investigated the microstructure and flux-pinning properties of the (Nd0.33Eu0.33Gd0.33)Ba2Cu3Oy (NEG-123) bulk superconductors with the addition of different amounts of Eu2BaCuO5 (Eu-211) secondary phase particles using SEM, EPMA and magnetic measurements. The SEM study showed that the submicrometre secondary-phase particles were finely distributed in the NEG-123 matrix. Chemical analyses revealed that the matrix composition changed with the quantity of Eu-211 particles. The scaling study of the volume pinning forces showed that the peak position lies around h≈0.52, which indicates enhanced ΔTc-type pinning. For the NEG-123 sample with 20 mol% Eu-211 additions, a large critical current density (Jc) of 50 000 A cm-2 was achieved at 77 K and 2.7 T for the H∥c axis.

元の言語English
ページ(範囲)1587-1594
ページ数8
ジャーナルSuperconductor Science and Technology
13
発行部数12
DOI
出版物ステータスPublished - 2000 12
外部発表Yes

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Flux pinning
flux pinning
Superconducting materials
Scanning electron microscopy
Magnetic variables measurement
Electron probe microanalysis
matrices
Chemical analysis
scanning electron microscopy
Microstructure
magnetic measurement
critical current
current density
scaling
microstructure

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Physics and Astronomy (miscellaneous)
  • Condensed Matter Physics

これを引用

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title = "Effect of Eu2BaCuO5 addition on the matrix composition and flux pinning in (Nd0.33Eu0.33Gd0.33)Ba2Cu3Oy superconductors",
abstract = "We have investigated the microstructure and flux-pinning properties of the (Nd0.33Eu0.33Gd0.33)Ba2Cu3Oy (NEG-123) bulk superconductors with the addition of different amounts of Eu2BaCuO5 (Eu-211) secondary phase particles using SEM, EPMA and magnetic measurements. The SEM study showed that the submicrometre secondary-phase particles were finely distributed in the NEG-123 matrix. Chemical analyses revealed that the matrix composition changed with the quantity of Eu-211 particles. The scaling study of the volume pinning forces showed that the peak position lies around h≈0.52, which indicates enhanced ΔTc-type pinning. For the NEG-123 sample with 20 mol{\%} Eu-211 additions, a large critical current density (Jc) of 50 000 A cm-2 was achieved at 77 K and 2.7 T for the H∥c axis.",
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T1 - Effect of Eu2BaCuO5 addition on the matrix composition and flux pinning in (Nd0.33Eu0.33Gd0.33)Ba2Cu3Oy superconductors

AU - Miryala, Muralidhar

AU - Murakami, Masato

PY - 2000/12

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N2 - We have investigated the microstructure and flux-pinning properties of the (Nd0.33Eu0.33Gd0.33)Ba2Cu3Oy (NEG-123) bulk superconductors with the addition of different amounts of Eu2BaCuO5 (Eu-211) secondary phase particles using SEM, EPMA and magnetic measurements. The SEM study showed that the submicrometre secondary-phase particles were finely distributed in the NEG-123 matrix. Chemical analyses revealed that the matrix composition changed with the quantity of Eu-211 particles. The scaling study of the volume pinning forces showed that the peak position lies around h≈0.52, which indicates enhanced ΔTc-type pinning. For the NEG-123 sample with 20 mol% Eu-211 additions, a large critical current density (Jc) of 50 000 A cm-2 was achieved at 77 K and 2.7 T for the H∥c axis.

AB - We have investigated the microstructure and flux-pinning properties of the (Nd0.33Eu0.33Gd0.33)Ba2Cu3Oy (NEG-123) bulk superconductors with the addition of different amounts of Eu2BaCuO5 (Eu-211) secondary phase particles using SEM, EPMA and magnetic measurements. The SEM study showed that the submicrometre secondary-phase particles were finely distributed in the NEG-123 matrix. Chemical analyses revealed that the matrix composition changed with the quantity of Eu-211 particles. The scaling study of the volume pinning forces showed that the peak position lies around h≈0.52, which indicates enhanced ΔTc-type pinning. For the NEG-123 sample with 20 mol% Eu-211 additions, a large critical current density (Jc) of 50 000 A cm-2 was achieved at 77 K and 2.7 T for the H∥c axis.

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