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Title: Single grain (LRE)-Ba-Cu-O superconductors fabricated by top seeded melt growth in air
Authors: Cardwell, DA
Hari Babu, N
Shi, Y
Iida, K
Keywords: Single grain;Bulk Superconductors
Issue Date: 2006
Citation: Journal of Physics: Conference Series, 2006, 43 (1), pp. 421 - 424
Abstract: We have recently reported a practical processing method for the fabrication in air of large, single grain (LRE)-Ba-Cu-O [where LRE Nd, Sm, Eu and Gd] bulk superconductors that exhibit high Tc and high Jc. The process is based initially on the development of a new type of generic seed crystal that can promote effectively the epitaxial nucleation of any (RE)-Ba-Cu-O system and, secondly, by suppressing the formation of (LRE)/Ba solid solution in a controlled manner within large LRE-Ba-Cu-O grains processed in air. In this paper we investigate the degree of homogeneity of large grain Sm-Ba-Cu-O superconductors fabricated by this novel process. The technique offers a significant degree of freedom in terms of processing parameters and reproducibility in the growth of oriented single grains in air and yields bulk samples with significantly improved superconducting and field-trapping properties compared to those processed by conventional top seeded melt growth (TSMG).
ISSN: 1742-6588
Appears in Collections:Brunel Centre for Advanced Solidification Technology (BCAST)

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