Fabrication and transport properties of Sr0.6K0.4Fe2As2 multifilamentary superconducting wires

Abstract

Seven-core Ag/Fe sheathed Sr0.6K0.4Fe2As2 (Sr-122) superconducting wires were produced by the ex situ powder-in-tube (PIT) method. The relationship between the cold-work deformation process and the superconducting properties of wires were systematically studied. It was found that flat rolling can efficiently increase the density of the superconducting core and largely improve the transport critical current density (Jc) of as-drawn wires. The Jc of the best sample achieved 21.1 kA/cm^2 at 4.2 K in self field, and showed very weak magnetic field dependence in high fields. Our result suggested a promising future of multifilamentary iron-based superconductors in practical application.

19 pages, 6 figures

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Cited by in corpus (9)

• Recent advances in iron-based superconductors toward applications
• Superconducting materials: Challenges and opportunities for large-scale applications
• Realization of practical level current densities in Sr0.6K0.4Fe2As2 tape conductors for high-field applications
• Fabrication of small superconducting coils using (Ba,A)Fe2As2 (A: Na, K) round wires with large critical current densities
• Critical current density and microstructure of iron sheathed multifilamentary Sr1-xKxFe2As2/Ag composite conductors
• Enhancement of critical current density in (Ba,Na)Fe2As2 round wires using high-pressure sintering
• Enhanced high-field transport critical current densities observed for the ex-situ PIT processed Ag/(Ba,K)Fe2As2 thin tapes
• Enhancement of transport critical current density of SmFeAsO1-xFx tapes fabricated by an ex-situ powder-in-tube method with a Sn-presintering process
• Optimization of a Non-arsenic Iron-based Superconductor for Wire Fabrication