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Title
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Reduced anisotropy and enhanced in-field performance of thick -doped films on ABAD-YSZ templates
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Author
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Abstract
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| Pure and 6 mol% BaHfO3 (BHO)-doped YBa2Cu3O7-δ (YBCO) films with a film thickness of around 1 μm were prepared on CeO2-buffered ABAD-YSZ templates by pulsed laser deposition. The self-field Jc at 77 K reaches 1.1 MA/cm2 in the doped sample compared with 2.5 MA/cm2 in pure YBCO. Above a magnetic field of 2.2 T along B||c, Jc of the BHO-doped sample exceeds the Jc of the undoped film. The maximum pinning force density (FP,max) reaches a value of around 3 GN/cm2 for both samples, but B(FP,max) increases from 1.4 T (pure) to a value of 2.9 T (BHO:YBCO). The Jc anisotropy curves of the doped sample show a large and broad peak at B||c and a strongly reduced anisotropy at all temperatures and fields compared with the pure sample. A complex defect structure with YBa2Cu4O8 intergrowths, Y2O3 precipitates, and BHO nanocolumns with a fan-shaped structure is observed by transmission electron microscopy investigations, which can explain the measured Jc(B, θ) behavior. |
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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.] - New York, N.Y.
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Publication
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New York, N.Y.
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2016
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ISSN
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1051-8223
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DOI
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10.1109/TASC.2016.2541998
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Volume/pages
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26
:3
(2016)
, 4 p.
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ISI
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000376189700001
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Full text (Publisher's DOI)
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Full text (publisher's version - intranet only)
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