Influence of hydrogen-containing argon gas on the structural parameters and superconducting properties of malic acid-doped MgB2 wires

Authors

M Maeda, University of WollongongFollow
J H. Kim, University of WollongongFollow
H Kumakura, National Institute For Materials Science
Y-U Heo, Pohang University of Science Technology Pohang, Kyungbuk
Y Zhao, University of WollongongFollow
Y Nakayama, Coll Sci & Technol, Chiyoda Ku, Tokyo, Japan
M Rindfleisch, Nuclear Hyper Tech Research, Inc
S. X. Dou, University of WollongongFollow

RIS ID

37547

Publication Details

Maeda, M., Kim, J. H., Kumakura, H., Heo, Y., Zhao, Y., Nakayama, Y., Rindfleisch, M. & Dou, S. X. (2011). Influence of hydrogen-containing argon gas on the structural parameters and superconducting properties of malic acid-doped MgB2 wires. Scripta Materialia, 64 (11), 1059-1062.

Abstract

We have studied the influence of hydrogen-containing argon gas on the structural and superconducting properties of MgB₂ wires. Lattice parameters were independent of the concentration level of hydrogen in argon, while the fraction of the secondary phase, MgO, was sensitive. The MgO particles observed by scanning transmission electron microscopy were 30–50 nm in size, which is considerably larger than the appropriate size range of flux pinning centers. The sintering atmosphere conditions are a crucial issue for MgB₂ wires.

Grant Number

ARC/DP0770205

Additional Grant Number

http://purl.org/au-research/grants/ARC/DP0770205