Title
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Double-disordered HTS-coated conductors and their assemblies aimed for ultra-high fields : large area tapes
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Author
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Abstract
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Double disordered (DD) HTS layers processed via high-fluence PLD with modulated pressure and barium zirconate precipitation yield very high engineering current densities, above 900 and 600 A/mm(2) at 18 and 31 T, respectively, measured at 4.2 K and B||c. Tape architecture is based on 50-100-mu m-thick polished stainless steel tape which prior to DD-HTS deposition was coated with YSZ template yielding a biaxial in-plane texture with FWHM = 10-11 degrees characterized using phi-scan XRD technique. High-resolution nanostructural analysis indicated a number of nonusual features inDDYBCOlayers regarding "firework"-like orientation of nanoprecipitations /nanochains. These new features result in a very high concentration of local defects which reduce the critical current (I-c) measured at 77 K, self-field to about 30% of the corresponding I-c in non-DD YBCO, and simultaneously lead to substantial gaining of I-c at high fields. The main result is a substantial improvement of I-c and engineering current density (J(e)) achieved at high field and liquid Helium temperature in long length, large area tapes with 4 and 12 mm width. J(e) above 970 A/mm2 at 4.2 K, B = 18 T, B||c was achieved in 12-mm-wide tape. |
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Language
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English
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Source (journal)
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IEEE transactions on applied superconductivity / IEEE. - New York, N.Y.
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Publication
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New York, N.Y.
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2018
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ISSN
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1051-8223
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DOI
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10.1109/TASC.2018.2801348
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Volume/pages
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28
:4
(2018)
, 6 p.
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Article Reference
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6602506
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ISI
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000432422800001
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Medium
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E-only publicatie
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Full text (Publisher's DOI)
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Full text (publisher's version - intranet only)
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