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Influence of antimony trioxide nanoparticle doping on superconductivity in MgB2 bulk

Published online by Cambridge University Press:  06 September 2011

Yun Zhang  and
Shi Xue Dou
Yun Zhang*
Affiliation:
Institute for Superconducting and Electronic Materials, University of Wollongong, Fairy Meadow, New South Wales 2519, Australia
Shi Xue Dou
Affiliation:
Institute for Superconducting and Electronic Materials, University of Wollongong, Fairy Meadow, New South Wales 2519, Australia
*
a)Address all correspondence to this author. e-mail: yunz@uow.edu.au
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Abstract

In this work, antimony trioxide (Sb2O3) has been doped into MgB2 samples to act as an additive. The doping level varies from 2.5 to 15 wt%. The effects of Sb2O3 addition on the lattice parameters, critical temperature (Tc), critical current density (Jc), and upper critical field (Hc2) have been investigated in detail. It has been found that Sb2O3 doping results in a small depression in Tc. The Jc value is 2.4 × 103 A·cm−2 for the 2.5% Sb2O3-doped sample at 5 K and 8 T, which is more than two times higher than for the undoped sample. The significant Jc improvement at high fields is attributed to the Hc2 enhancement caused by the increased disorder.

Keywords

Superconducting
Type
Articles
Information
Journal of Materials Research , Volume 26 , Issue 21 , 14 November 2011 , pp. 2701 - 2706
Copyright
Copyright © Materials Research Society 2011

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