Low-temperature synthesis to achieve high critical current density and avoid a reaction layer in SmFeAsO1-xFx superconducting tapes

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

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

A low-temperature (300-500 °C) heat treatment process under ambient pressure or uniaxial pressure was performed on Sn-added SmFeAsO1-xFx superconducting tapes fabricated by the ex situ powder-in-tube method. A highest transport critical current density (J c) of 3.95 × 104 A cm-2 (at 4.2 K and self-field) was achieved by this process. The low-temperature process allows tapes to endure much longer heat treatment without J c degradation than the high-temperature method. Microscopic analysis also revealed that this method could obtain a clear boundary without a reaction layer or interdiffusion between a superconducting core and sheath metal.

Original languageEnglish
Article number105005
JournalSuperconductor Science and Technology
Volume28
Issue number10
DOIs
Publication statusPublished - 2015 Aug 24

Keywords

  • Iron-based superconductors
  • critical-current density, tapes

ASJC Scopus subject areas

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

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