Studies of flux pinning behaviour in melt-processed ternary (Nd-Eu-Gd)Ba2Cu3Oy superconductors

A. K. Pradhan, Muralidhar Miryala, Masato Murakami, N. Koshizuka

研究成果: Article

6 引用 (Scopus)

抄録

The flux pinning behaviour of ternary melt-processed (Nd-Eu-Gd)Ba2Cu3Oy superconductors is studied with various second-phase defect concentrations using magnetotransport and magnetization measurements. A pronounced field-induced bump feature in the resistivity was observed. The dissipation was found to be thermal activation type. The current-voltage (I-V) characteristics over the whole transition temperature regime show a linear flux-flow type behaviour at high fields that favours an increase in viscosity in the liquid phase. However, I-V curves show a change of curvature at low field. The Nd/Ba substitution sites along with second-phase particles refined by the addition of a small amount of Pt are basically responsible for high flux pinning.

元の言語English
ページ(範囲)761-765
ページ数5
ジャーナルSuperconductor Science and Technology
13
発行部数6
DOI
出版物ステータスPublished - 2000 6
外部発表Yes

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Flux pinning
flux pinning
Superconducting materials
Galvanomagnetic effects
Superconducting transition temperature
Magnetization
liquid phases
Substitution reactions
dissipation
Chemical activation
transition temperature
curvature
activation
Viscosity
substitutes
viscosity
Fluxes
magnetization
Defects
electrical resistivity

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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T1 - Studies of flux pinning behaviour in melt-processed ternary (Nd-Eu-Gd)Ba2Cu3Oy superconductors

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AU - Miryala, Muralidhar

AU - Murakami, Masato

AU - Koshizuka, N.

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N2 - The flux pinning behaviour of ternary melt-processed (Nd-Eu-Gd)Ba2Cu3Oy superconductors is studied with various second-phase defect concentrations using magnetotransport and magnetization measurements. A pronounced field-induced bump feature in the resistivity was observed. The dissipation was found to be thermal activation type. The current-voltage (I-V) characteristics over the whole transition temperature regime show a linear flux-flow type behaviour at high fields that favours an increase in viscosity in the liquid phase. However, I-V curves show a change of curvature at low field. The Nd/Ba substitution sites along with second-phase particles refined by the addition of a small amount of Pt are basically responsible for high flux pinning.

AB - The flux pinning behaviour of ternary melt-processed (Nd-Eu-Gd)Ba2Cu3Oy superconductors is studied with various second-phase defect concentrations using magnetotransport and magnetization measurements. A pronounced field-induced bump feature in the resistivity was observed. The dissipation was found to be thermal activation type. The current-voltage (I-V) characteristics over the whole transition temperature regime show a linear flux-flow type behaviour at high fields that favours an increase in viscosity in the liquid phase. However, I-V curves show a change of curvature at low field. The Nd/Ba substitution sites along with second-phase particles refined by the addition of a small amount of Pt are basically responsible for high flux pinning.

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