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|Title:||Single grain (LRE)-Ba-Cu-O superconductors fabricated by top seeded melt growth in air|
Hari Babu, N
|Keywords:||Single grain;Bulk Superconductors|
|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).|
|Appears in Collections:||Brunel Centre for Advanced Solidification Technology (BCAST)|
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