Transport critical current on Fe-sheathed MgB2 coils

H. Fang, P. T. Putman, S. Padmanabhan, Y. X. Zhou, K. Salama

Research output: Contribution to journalArticle

20 Scopus citations

Abstract

Helical windings of Fe-sheathed MgB2 wires with different dimensions were fabricated by a wind-and-react process. Wires with a cross-sectional area of 1 mm2 and 20% superconductor core were made using the powder-in-tube (PIT) method and ultra-fine starting precursors. Very good grain connectivity as well as high core density was obtained by using this method. At 20 K and self-field, the critical current of a coil with an ID of 12 mm and 12 turns was 360 A, which is equivalent to a Jc of 1.8 × 105 A cm-2. At a 6 T external magnetic field and 4.2 K, a coil with an ID of 140 mm and 10 turns possessed a Jc of 1 × 104 A cm-2. These results are a step towards the application of MgB2 wires in the temperature range of 20-30 K and high magnetic fields.

Original languageEnglish (US)
Pages (from-to)717-720
Number of pages4
JournalSuperconductor Science and Technology
Volume17
Issue number4
DOIs
StatePublished - Apr 1 2004

ASJC Scopus subject areas

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

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