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Measuring the interaction force between a high temperature superconductor and a permanent magnet Am.Application of a high critical temperature superconductor bearing for high vacuum measurement J. Vac. Sci. Technol. A 15, 759 (1997); 10.1116/1.580816Magnetic levitation/suspension system by high-temperature superconducting materials

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An epitaxial Y2O3/YSZ/CeO2 buffer architecture has been prepared on cube textured Ni–5 at.%W, Ni–7.5 at.%W and Ni–9 at.%W tapes using pulsed laser deposition. The buffer layer growth was studied in detail and revealed a good texture transfer throughout the structure on the global as well as on the local scale. YBCO (yttrium barium copper oxide) layers were successfully deposited on the buffered tapes, showing an in-plane texture spread of about 7°. Microstructural investigations revealed clear interfaces and a homogeneous surface structure. A superconducting transition temperature of more than 89 K with a small transition width was observed for all metal substrates. A critical current density Jc of more than 0.9 MA cm − 2 was measured inductively at 77 K in the self-field on all substrates.

A procedure is developed for assessing the epitaxy of La 2 Zr 2+ O 7 (LZO) layers on NiW RABITS. Comparing XRD patterns ( 2 scans and 2D rocking curves) of LZO films of known thickness (ellipsometry or reflectometry measurements) with those of standard samples (100% epitaxial LZO film and an isotropic LZO pellet of known density), we estimate the epitaxial ( ), and polycrystalline ( ) fractions of LZO within the layer. The procedure was tested using MOD-LZO(100 nm)/NiW tape samples with varied from 3 to 90% (reproducibly prepared by varying the humidity of Ar 5%H 2 gas during heat treatment). A qualitative agreement with RHEED and quantitative (within 10%) agreement with the EBSD results was shown. Correlation between EF and c in 600 nm thick YBCO layer deposited on MOD-LZO/NiW using thermal coevaporation enables us to impose the = 80% margin on the quality of LZO layer for the particular conductor architecture.