CUED Publications database

Superconducting properties of Gd-Ba-Cu-O single grains processed from a new, Ba-rich precursor compound

Shi, Y and Babu, NH and Iida, K and Cardwell, DA (2008) Superconducting properties of Gd-Ba-Cu-O single grains processed from a new, Ba-rich precursor compound. Journal of Physics: Conference Series, 97. ISSN 1742-6588

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Abstract

Gd-Ba-Cu-O (GdBCO) single grains have been previously melt-processed successfully in air using a generic Mg-Nd-Ba-Cu-O (Mg-NdBCO) seed crystal. Previous research has revealed that the addition of a small amount of BaO 2 to the precursor powders prior to melt processing can suppress the formation of Gd/Ba solid solution, and lead to a significant improvement in superconducting properties of the single grains. Research into the effects of a higher Ba content on single grain growth, however, has been limited by the relatively small grain size in the earlier studies. This has been addressed by developing Ba-rich precursor compounds Gd-163 and Gd-143, fabricated specifically to enable the presence of greater concentrations of Ba during the melt process. In this study, we propose a new processing route for the fabrication of high performance GdBCO single grain bulk superconductors in air by enriching the precursor powder with these new Ba rich compounds. The influence of the addition of the new compounds on the microstructures and superconducting properties of GdBCO single grains is reported. © 2008 IOP Publishing Ltd.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div C > Materials Engineering
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 12:13
Last Modified: 28 Nov 2014 19:05
DOI: 10.1088/1742-6596/97/1/012250