Improved superconducting properties due to Ag2O addition in NEG-123

研究成果: Article

6 引用 (Scopus)

抄録

We prepared NEG + 10 mol% NEG-211 + 0.5 mol% Pt with 0-50 wt.% Ag2O, which are subjected to the oxygen-controlled melt-growth process. Microstructural observation showed that fine Ag particles are dispersed at lower Ag2O contents. At higher contents, Ag particles exhibited various sizes and shapes and segregated mostly in the vicinity of microcracks and pores. The irreversibility field increased with Ag2O content up to 20 wt.%, and even with 50 wt.% the magnetization loop was open at 77 K and 7 T. In the sample with 20 wt.% of Ag2O, a large critical current density of 10 kA cm-2 was recorded even at 7 T and 77 K with the field applied parallel to the c-axis of the sample.

元の言語English
ページ(範囲)657-660
ページ数4
ジャーナルPhysica C: Superconductivity and its Applications
357-360
発行部数SUPPL. 2
DOI
出版物ステータスPublished - 2001 8
外部発表Yes

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Microcracks
Magnetization
Oxygen
microcracks
critical current
current density
porosity
magnetization
oxygen

ASJC Scopus subject areas

  • Condensed Matter Physics

これを引用

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title = "Improved superconducting properties due to Ag2O addition in NEG-123",
abstract = "We prepared NEG + 10 mol{\%} NEG-211 + 0.5 mol{\%} Pt with 0-50 wt.{\%} Ag2O, which are subjected to the oxygen-controlled melt-growth process. Microstructural observation showed that fine Ag particles are dispersed at lower Ag2O contents. At higher contents, Ag particles exhibited various sizes and shapes and segregated mostly in the vicinity of microcracks and pores. The irreversibility field increased with Ag2O content up to 20 wt.{\%}, and even with 50 wt.{\%} the magnetization loop was open at 77 K and 7 T. In the sample with 20 wt.{\%} of Ag2O, a large critical current density of 10 kA cm-2 was recorded even at 7 T and 77 K with the field applied parallel to the c-axis of the sample.",
keywords = "Critical current density, Flux pinning, LRE-BaCuO, Melt-textured materials, Microstructure",
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AU - Murakami, Masato

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N2 - We prepared NEG + 10 mol% NEG-211 + 0.5 mol% Pt with 0-50 wt.% Ag2O, which are subjected to the oxygen-controlled melt-growth process. Microstructural observation showed that fine Ag particles are dispersed at lower Ag2O contents. At higher contents, Ag particles exhibited various sizes and shapes and segregated mostly in the vicinity of microcracks and pores. The irreversibility field increased with Ag2O content up to 20 wt.%, and even with 50 wt.% the magnetization loop was open at 77 K and 7 T. In the sample with 20 wt.% of Ag2O, a large critical current density of 10 kA cm-2 was recorded even at 7 T and 77 K with the field applied parallel to the c-axis of the sample.

AB - We prepared NEG + 10 mol% NEG-211 + 0.5 mol% Pt with 0-50 wt.% Ag2O, which are subjected to the oxygen-controlled melt-growth process. Microstructural observation showed that fine Ag particles are dispersed at lower Ag2O contents. At higher contents, Ag particles exhibited various sizes and shapes and segregated mostly in the vicinity of microcracks and pores. The irreversibility field increased with Ag2O content up to 20 wt.%, and even with 50 wt.% the magnetization loop was open at 77 K and 7 T. In the sample with 20 wt.% of Ag2O, a large critical current density of 10 kA cm-2 was recorded even at 7 T and 77 K with the field applied parallel to the c-axis of the sample.

KW - Critical current density

KW - Flux pinning

KW - LRE-BaCuO

KW - Melt-textured materials

KW - Microstructure

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