Microstructure and transport critical current in Sr0.6K 0.4Fe2As2 superconducting tapes prepared by cold pressing

Chao Yao, He Lin, Xianping Zhang, Dongliang Wang, Qianjun Zhang, Yanwei Ma, Satoshi Awaji, Kazuo Watanabe

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)

Abstract

Fe-clad Sr0.6K0.4Fe2As2 (Sr-122) superconducting tapes were fabricated by cold uniaxial pressing. It is found that the pressing can improve the mass density and induce c-axis texture in the Sr-122 core. With an increase of pressure from 0.6 to 1.8 GPa, the degree of texture increases monotonically. The transport current density (Jc) is correspondingly improved until the applied pressure comes up to 1.4 GPa, and finally becomes saturated at 1.8 GPa. A transport Jc as high as 16.8 kA cm-2 (at 4.2 K in self-field) is achieved at 1.4 GPa. The saturation effect of transport Jc can be ascribed to the microcracks in the grains induced by the strong deformation force when the applied pressure is high.

Original languageEnglish
Article number075003
JournalSuperconductor Science and Technology
Volume26
Issue number7
DOIs
Publication statusPublished - 2013 Jul 1

ASJC Scopus subject areas

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

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