Critical current density for filamentary (Nd, Eu, Gd)Ba2Cu 3Oy superconductors

Y. Hirata, T. Goto, K. Watanabe

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4 Citations (Scopus)

Abstract

In order to study the effect of matrix composition in the filamentary (Nd, Eu, Gd)Ba2Cu3Oy ((Nd, Eu, Gd)123) superconductors on critical current density, we prepared three samples with various rare-earth ratios: (Nd0.33Eu0.38Gd 0.28)123 (sample A), (Nd0.33Eu0.33Gd 0.33)123 (sample B), (Nd0.33Eu0.08Gd 0.58)123 (sample C). The filamentary precursor was prepared by a solution-spinning method and partially melted in flowing 0.1%O2+Ar and 1%O2+Ar. The samples had well aligned texture along the filamentary diameter as well as the length except sample C processed in flowing 1%O2+Ar. The Tc value for the samples processed in flowing 0.1%O2+Ar is higher than that for 1%O2+Ar. The high Jc value more than 104 A/cm2 at 77 K and self-field is attained for samples A and B. The field dependence of J c for the samples was measured at 77 K up to 14 T by changing the angle along the filament diameter. The anisotropic behavior of the J c-B curve was detected. The Jc values and irreversibility field for the samples processed in flowing 0.1%O2+Ar are higher than those for 1%O2+Ar. By optimizing the angle for the samples, the highest Jc value of 3400 A/cm2 at 14 T was attained for sample A.

Original languageEnglish
Pages (from-to)958-962
Number of pages5
JournalPhysica C: Superconductivity and its applications
Volume412-414
Issue numberSPEC. ISS.
DOIs
Publication statusPublished - 2004 Oct

Keywords

  • (Nd, Eu, Gd)-Ba-Cu-O
  • Oxygen-controlled-melt-growth process
  • Superconducting filament

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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