Transport current density at temperatures up to 25 K of Cu/Ag composite sheathed 122-type tapes and wires

Shifa Liu, Kaili Lin, Chao Yao, Xianping Zhang, Chiheng Dong, Dongliang Wang, Satoshi Awaji, Hiroaki Kumakura, Yanwei Ma

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

The fabrication of iron-based superconductors with high transport critical current density (J c) and low cost is a crucial determinant of whether they can be used for practical applications. In this paper, Cu/Ag composite sheathed Sr0.6K0.4Fe2As2 (Sr122) tapes and Ba0.6K0.4Fe2As2 (Ba122) round wires were fabricated via an ex situ powder-in-tube method and heat-treated by the hot pressing and hot isostatic pressing process respectively. In order to thoroughly reveal the application potential of Cu/Ag composite sheathed '122' iron pnictide superconductors, transport J c of tapes and wires in high fields at temperatures up to 25 K was measured. High transport J c of 4.4 ×104 A cm-2 at 4.2 K and 3.6 ×103 A cm-2 at 20 K in 10 T was achieved in Cu/Ag composite sheathed Sr122 tapes. Transport J c of Ba122 wires is 9.4 ×103 A cm-2 at 4.2 K and 1.9 ×103 A cm-2 at 20 K in 10 T. These results demonstrate the great potential of Cu/Ag composite sheathed '122' iron pnictide superconducting tapes and wires for high-field applications at intermediate temperatures around 20 K, which can be easily obtained by using cryocoolers.

Original languageEnglish
Article number115007
JournalSuperconductor Science and Technology
Volume30
Issue number11
DOIs
Publication statusPublished - 2017 Oct 2

Keywords

  • 122-type iron pnictides
  • high-field applications
  • intermediate temperatures
  • practical utilization
  • round wires
  • tapes
  • transport J

ASJC Scopus subject areas

  • Ceramics and Composites
  • Condensed Matter Physics
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

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