Top-seeded infiltration growth of Y-Ba-Cu-O bulk superconductors
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Publication Details
Author list: Umakoshi S., Ikeda Y., Wongsatanawarid A., Kim C.-J., Murakami M.
Publication year: 2011
Volume number: 471
Issue number: 21-22
Start page: 843
End page: 845
Number of pages: 3
ISSN: 0921-4534
eISSN: 0921-4534
Languages: English-Great Britain (EN-GB)
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Abstract
A top-seeded melt-growth (TSMG) process is widely used to fabricate single domain YBa2Cu3Oy (Y-Ba-Cu-O) bulk superconductors. Pores are often found in the TSMG-processed Y-Ba-Cu-O samples due to the oxygen gas evolution during the molten stage. Recently developed liquid infiltration growth (LIG) process is known to be effective in suppressing the pore evolution and in refining the size of Y2BaCuO5 (Y211) particles dispersed in YBa2Cu3Oy matrix. The LIG process utilizes the liquid (Ba3Cu5O8) infiltration into a pre- sintered Y211 contact and slow cooling through a peritectic temperature. In this study, we fabricated bulk Y-Ba-Cu-O superconductors by the LIG process combined with top-seeding with SmBa 2Cu3Oy seed and confirmed that a single-domain bulk can be produced. Trapped field measurements however showed that some distortion in the field distribution was observed in the region near the seed crystal, which was attributed to Y211 density and its relatively large size. ฉ 2011 Elsevier B.V. All rights reserved.
Keywords
Bulk YBCO, Liquid infiltration growth, Y2O3 additive
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