Development of single solution buffer layers on textured Ni substrate for HTS coated conductors

• Published in: IEEE transactions on applied superconductivity 2005-06, Vol.15 (2), p.2711-2714
• Main Authors: Zhou, Y.X., Zhang, X., Fang, H., Putman, P.T., Salama, K.
• Format: Article
• Language: English
• Subjects: ANNEALING PROCESSES; Applied sciences; Buffer layers; Buffers; Chemicals; coated conductor; COATINGS; Conductors; COPPER OXIDE; Costs; CRYSTAL GROWTH; DEPOSITION; Electric connection. Cables. Wiring; ELECTRICAL CONDUCTORS; Electrical engineering. Electrical power engineering; Electronics; EPITAXY; Exact sciences and technology; High temperature superconductors; Manufacturing; Microelectronic fabrication (materials and surfaces technology); MOCVD; Nickel; Pole figures; Scalability; Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices; Solar energy; Substrates; SUPERCONDUCTORS; Surface layer; Texture; TEXTURES; Thin films; Various equipment and components; YBCO; YBCO superconductors; Yttrium barium copper oxide
• ISSN: 1051-8223; 1558-2515
• DOI: 10.1109/TASC.2005.847792

Much effort has recently been made to develop chemical methods for the manufacturing of coated conductors because of their scalability, low cost and high deposition rate. In this research, epitaxial buffer layers of Gd/sub 2/Zr/sub 2/O/sub 7/ (GZO) have been grown on Ni substrates using a newly developed metal organic decomposition (MOD) approach. The solution prepared from metal-organic precursors was deposited on Ni substrates using the dip coating technique and then was annealed at a high temperature. Texture analysis shows full-width-at-half-maximum (FWHM) values for out-of-plane and in-plane alignments as 6.5/spl deg/ and 8.1/spl deg/, respectively. Pole figure studies indicate a single cube-on-cube texture while SEM micrographs reveal a dense, continuous, and crack-free buffer layer. MOCVD was used to grow 1 /spl mu/m YBCO film on this GZO buffered Ni substrate. A critical current, J/sub c/, of about 1.3 MA/cm/sup 2/ at 77 K and self-field was obtained on YBCO (MOCVD)/GZO(MOD)/Ni. These results give promise to using a single buffer layer for scalable coated conductors.