Flux pinning in ternary (Nd0.33Eu0.33Gd0.33)Ba2Cu 3Oy melt-processed superconductors

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Abstract

The flux pinning characteristics of ternary melt-processed (Nd0.33Eu0.33Gd0.33)Ba2Cu 3Oy (NEG) superconductors are studied in the temperature range 60≤T≤90K. NEG samples exhibit a strongly developed peak effect in the dependence of the critical current densities on the external field, Ha. The scaling of the pinning forces versus the reduced field h=Ha/Hirr (where Hirr denotes the irreversibility field) yields a peak at h0=0.5 which is an indication of pinning provided by a spatial variation of the transition temperature. The presence of a weaker superconducting second phase is demonstrated by means of field cooling and warming experiments in fields up to 7 T. Furthermore, we discuss the possible effect of the magnetic moments of Gd and Nd on the flux pinning.

Original languageEnglish
Pages (from-to)2351-2353
Number of pages3
JournalApplied Physics Letters
Volume73
Issue number16
DOIs
Publication statusPublished - 1998
Externally publishedYes

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flux pinning
critical current
indication
magnetic moments
transition temperature
current density
cooling
scaling
heating
temperature

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

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title = "Flux pinning in ternary (Nd0.33Eu0.33Gd0.33)Ba2Cu 3Oy melt-processed superconductors",
abstract = "The flux pinning characteristics of ternary melt-processed (Nd0.33Eu0.33Gd0.33)Ba2Cu 3Oy (NEG) superconductors are studied in the temperature range 60≤T≤90K. NEG samples exhibit a strongly developed peak effect in the dependence of the critical current densities on the external field, Ha. The scaling of the pinning forces versus the reduced field h=Ha/Hirr (where Hirr denotes the irreversibility field) yields a peak at h0=0.5 which is an indication of pinning provided by a spatial variation of the transition temperature. The presence of a weaker superconducting second phase is demonstrated by means of field cooling and warming experiments in fields up to 7 T. Furthermore, we discuss the possible effect of the magnetic moments of Gd and Nd on the flux pinning.",
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T1 - Flux pinning in ternary (Nd0.33Eu0.33Gd0.33)Ba2Cu 3Oy melt-processed superconductors

AU - Koblischka, Michael Rudolf

AU - Miryala, Muralidhar

AU - Murakami, Masato

PY - 1998

Y1 - 1998

N2 - The flux pinning characteristics of ternary melt-processed (Nd0.33Eu0.33Gd0.33)Ba2Cu 3Oy (NEG) superconductors are studied in the temperature range 60≤T≤90K. NEG samples exhibit a strongly developed peak effect in the dependence of the critical current densities on the external field, Ha. The scaling of the pinning forces versus the reduced field h=Ha/Hirr (where Hirr denotes the irreversibility field) yields a peak at h0=0.5 which is an indication of pinning provided by a spatial variation of the transition temperature. The presence of a weaker superconducting second phase is demonstrated by means of field cooling and warming experiments in fields up to 7 T. Furthermore, we discuss the possible effect of the magnetic moments of Gd and Nd on the flux pinning.

AB - The flux pinning characteristics of ternary melt-processed (Nd0.33Eu0.33Gd0.33)Ba2Cu 3Oy (NEG) superconductors are studied in the temperature range 60≤T≤90K. NEG samples exhibit a strongly developed peak effect in the dependence of the critical current densities on the external field, Ha. The scaling of the pinning forces versus the reduced field h=Ha/Hirr (where Hirr denotes the irreversibility field) yields a peak at h0=0.5 which is an indication of pinning provided by a spatial variation of the transition temperature. The presence of a weaker superconducting second phase is demonstrated by means of field cooling and warming experiments in fields up to 7 T. Furthermore, we discuss the possible effect of the magnetic moments of Gd and Nd on the flux pinning.

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