Fabrication of multi-filamentary LRE123 superconductors

Tomoko Goto, Yasuo Adachi, Youji Bito, Kazuo Watanabe

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The fabrication of multi-filamentary LRE123 (LRE = Nd, Sm, Eu and Gd) superconductors was examined. The precursor LRE123 filaments were prepared by solution spinning through aqueous poly(vinyl alcohol) solution containing mixed Nd, Sm, Eu, Gd, Ba and Cu acetates. The as-drawn filaments were heated to remove volatile components and were oxygen controlled melt growth processed in flowing 1%O2 + Ar and 0.1%O2 + Ar and then oxygenated. The filamentary superconductors were passed through Ag paste and sintered. By controlling the heating condition, a composite with excellent connection between the filaments and metallic Ag matrix was obtained. An overall transport critical current (Je) of more than 1900 A/cm2 at 77 K and 0 T was achieved for the composite with LRE123 filaments partially melted in flowing 0.1%O2 + Ar. The superconductivity at 77 K was maintained by applying a field more than 10 T. The field dependence of Je for the composite with LRE123 filaments was superior for the composite with Y123 filaments.

Original languageEnglish
Pages (from-to)771-774
Number of pages4
JournalPhysica C: Superconductivity and its applications
Volume372-376
Issue numberPART 2
DOIs
Publication statusPublished - 2002 Aug

Keywords

  • Ag matrix
  • Field dependence of J
  • LRE123 filament
  • Multi-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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