High Critical Current Density in Cu-Sheathed SmFeAsO1-xFx Superconducting Tapes by Low-Temperature Hot-Pressing

Qianjun Zhang, Chao Yao, Xianping Zhang, Dongliang Wang, Chiheng Dong, He Huang, Pusheng Yuan, Yanwei Ma, Satoshi Awaji, Kazuo Watanabe

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Cu-sheathed SmFeAsO1-xFx tapes were fabricated by the ex situ powder-in-tube method. A series of low-temperature (400 °C) hot-pressing process and ordinary sintering process was applied on the tapes, respectively. A transport critical current density (Jc) value of 2.37 × 104 A cm-2 (at 4.2 K and self-field) was achieved in the Cu-sheathed SmFeAsO1-xFx hot-pressed tapes. This is the first time that a large transport Jc is obtained in Cu-sheathed 1111-type wires. The scanning electron microscopy also revealed that the low-temperature hot-pressing technique is effective in preventing the reaction layer between Cu-sheath and superconducting core.

Original languageEnglish
Article number7468584
JournalIEEE Transactions on Applied Superconductivity
Volume26
Issue number3
DOIs
Publication statusPublished - 2016 Apr

Keywords

  • Fe-based superconductors
  • Iron pnictide
  • high temperature superconductors
  • wires

ASJC Scopus subject areas

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

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