High transport current superconductivity in powder-in-tube Ba0.6K0.4Fe2As2 tapes at 27 T

He Huang, Chao Yao, Chiheng Dong, Xianping Zhang, Dongliang Wang, Zhe Cheng, Jianqi Li, Satoshi Awaji, Haihu Wen, Yanwei Ma

Research output: Contribution to journalArticlepeer-review

50 Citations (Scopus)

Abstract

The high upper critical field and low anisotropy of iron-based superconductors (IBS) make them particularly attractive for high-field applications, especially for the construction of next-generation nuclear magnetic resonance spectrometers, particle accelerators and high-field magnets. However, for practical use it is essential to make IBS materials into wire and tape conductors with sufficient current carrying capability, which is limited by misaligned grains inside the conductors. Here, based on a simple and low-cost powder-in-tube (PIT) method, we demonstrate a high transport critical current density (J c) reaching 1.5 × 105 A cm-2 (I c = 437 A) at 4.2 K and 10 T in Ba0.6K0.4Fe2As2 (Ba-122) tapes by texturing the grain orientation with optimized hot-press technique. The transport J c measured at 4.2 K under high magnetic fields of 27 T is still on the level of 5.5 × 104 A cm-2. Moreover, at 20 K and 5 T the transport J c is also as high as 5.4 × 104 A cm-2, showing a promising application potential in moderate temperature range which can be reached by liquid hydrogen or cryogenic cooling. All these J c values are the highest ever reported for IBS wires and tapes. The high-performance PIT Ba-122 tapes in this work suggest IBS to be a strong potential competitor of cuprate superconductors for the race of high-field applications in the future.

Original languageEnglish
Article number015017
JournalSuperconductor Science and Technology
Volume31
Issue number1
DOIs
Publication statusPublished - 2018 Jan

Keywords

  • critical current density
  • iron-based superconducting tapes
  • powder-in-tube method

ASJC Scopus subject areas

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

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