Improvement of the superconducting properties in (Nd, Sm, Eu)-Ba-Cu-O using melt-quenched precursors

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4 Citations (Scopus)

Abstract

We have studied the effect of precursor preparation methods on the superconducting properties of (Nd, Sm, Eu)-Ba-Cu-O melt-textured in 1% O2-Ar. X-ray diffraction analyses confirmed that melt-quenching was effective in suppressing the formation of RE rich RE1+xBa2-xCu3Oy precursor powders compared to a sintering method, and thus resulted in a sharp superconducting transition with an onset Tc exceeding 94.5 K. A clear secondary peak effect was observed in the magnetization curves, which shows that the field induced pinning is active like the other RE-Ba-Cu-O (RE; Nd, Sm, Eu, Gd). One can conclude that poor superconducting properties of (Nd, Sm, Eu)-Ba-Cu-O obtained in the previous reports are not intrinsic to the system but to an unoptimized precursor preparation method.

Original languageEnglish
Pages (from-to)39-42
Number of pages4
JournalPhysica C: Superconductivity and its Applications
Volume309
Issue number1-2
Publication statusPublished - 1998 Dec 1
Externally publishedYes

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Powders
Quenching
Magnetization
Sintering
X ray diffraction
preparation
sintering
quenching
magnetization
curves
diffraction
x rays

Keywords

  • (Nd, Sm, Eu)-Ba-Cu-O
  • Critical current density
  • Critical temperature
  • Melt process
  • Melt quenching
  • Peak effect

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

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title = "Improvement of the superconducting properties in (Nd, Sm, Eu)-Ba-Cu-O using melt-quenched precursors",
abstract = "We have studied the effect of precursor preparation methods on the superconducting properties of (Nd, Sm, Eu)-Ba-Cu-O melt-textured in 1{\%} O2-Ar. X-ray diffraction analyses confirmed that melt-quenching was effective in suppressing the formation of RE rich RE1+xBa2-xCu3Oy precursor powders compared to a sintering method, and thus resulted in a sharp superconducting transition with an onset Tc exceeding 94.5 K. A clear secondary peak effect was observed in the magnetization curves, which shows that the field induced pinning is active like the other RE-Ba-Cu-O (RE; Nd, Sm, Eu, Gd). One can conclude that poor superconducting properties of (Nd, Sm, Eu)-Ba-Cu-O obtained in the previous reports are not intrinsic to the system but to an unoptimized precursor preparation method.",
keywords = "(Nd, Sm, Eu)-Ba-Cu-O, Critical current density, Critical temperature, Melt process, Melt quenching, Peak effect",
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T1 - Improvement of the superconducting properties in (Nd, Sm, Eu)-Ba-Cu-O using melt-quenched precursors

AU - Miryala, Muralidhar

AU - Murakami, Masato

PY - 1998/12/1

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N2 - We have studied the effect of precursor preparation methods on the superconducting properties of (Nd, Sm, Eu)-Ba-Cu-O melt-textured in 1% O2-Ar. X-ray diffraction analyses confirmed that melt-quenching was effective in suppressing the formation of RE rich RE1+xBa2-xCu3Oy precursor powders compared to a sintering method, and thus resulted in a sharp superconducting transition with an onset Tc exceeding 94.5 K. A clear secondary peak effect was observed in the magnetization curves, which shows that the field induced pinning is active like the other RE-Ba-Cu-O (RE; Nd, Sm, Eu, Gd). One can conclude that poor superconducting properties of (Nd, Sm, Eu)-Ba-Cu-O obtained in the previous reports are not intrinsic to the system but to an unoptimized precursor preparation method.

AB - We have studied the effect of precursor preparation methods on the superconducting properties of (Nd, Sm, Eu)-Ba-Cu-O melt-textured in 1% O2-Ar. X-ray diffraction analyses confirmed that melt-quenching was effective in suppressing the formation of RE rich RE1+xBa2-xCu3Oy precursor powders compared to a sintering method, and thus resulted in a sharp superconducting transition with an onset Tc exceeding 94.5 K. A clear secondary peak effect was observed in the magnetization curves, which shows that the field induced pinning is active like the other RE-Ba-Cu-O (RE; Nd, Sm, Eu, Gd). One can conclude that poor superconducting properties of (Nd, Sm, Eu)-Ba-Cu-O obtained in the previous reports are not intrinsic to the system but to an unoptimized precursor preparation method.

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KW - Critical temperature

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KW - Melt quenching

KW - Peak effect

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