YBCO/YCBCO multi-layer healing technique for YBCO coated conductors

The influence of (Y/sub 0.8/Ca/sub 0.2/)Ba/sub 2/Cu/sub 3/O/sub y/ (YCBCO) over-layers on YBCO film properties has been studied on multi-layer YBCO/YCBCO films. The films were deposited on [001] MgO single-crystal substrates by pulsed-laser deposition. The results unambiguously demonstrate that a YC...

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Veröffentlicht in:	IEEE transactions on applied superconductivity 2005-06, Vol.15 (2), p.3086-3089
Hauptverfasser:	Meng, R.L., Baikalov, A., Pham, D., Rusakova, I.A., Sun, Y.Y., Cmaidalka, J., Wang, C., Iliev, M.N., Chu, C.W.
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences COATINGS Conducting materials Conductive films Conductors COPPER OXIDE Costs Crystal microstructure Crystallinity Crystallization Current density DEPOSITION Electric connection. Cables. Wiring ELECTRICAL CONDUCTORS Electrical engineering. Electrical power engineering Electronics Exact sciences and technology Healing MAGNESIUM OXIDE Microelectronic fabrication (materials and surfaces technology) Multilayers Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices Sun Superconducting materials SUPERCONDUCTIVITY SUPERCONDUCTORS thin films Various equipment and components YBCO superconductors Yttrium barium copper oxide YTTRIUM OXIDE
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Zusammenfassung:	The influence of (Y/sub 0.8/Ca/sub 0.2/)Ba/sub 2/Cu/sub 3/O/sub y/ (YCBCO) over-layers on YBCO film properties has been studied on multi-layer YBCO/YCBCO films. The films were deposited on [001] MgO single-crystal substrates by pulsed-laser deposition. The results unambiguously demonstrate that a YCBCO over-layer can greatly improve the overall crystallinity of the YBCO films and thus their J/sub c/. An optimal layer-number (n) of the multi-layer YBCO (n layers)/YCBCO (n-1 layers) has been identified to produce a maximum J/sub c/ enhancement. The observations suggest that the YBCO/YCBCO multi-layer healing technique (MLHT) mentioned above may be used for the fabrication of low cost, high performance YBCO coated conductors by relaxing the stringent and costly requirements for precise atomic alignment employed in previous fabrication methods.
ISSN:	1051-8223 1558-2515
DOI:	10.1109/TASC.2005.848964