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Solution processing of lanthanum zirconate films as single buffer layers for high Ic YBCO coated conductors

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8 Author(s)
Sathyamurthy, S. ; Chem. Sci. Div., Oak Ridge Nat. Lab., TN, USA ; Paranthaman, M.P. ; Zhai, Hong-Ying ; Sukill Kang
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Sol-gel processing of lanthanum zirconate (La2Zr2O7 - referred to as LZO) buffer layers on biaxially textured nickel and Ni-3 at.% W alloy substrates using spin coating and a continuous reel-to-reel dip-coating unit has been studied. The epitaxial LZO films obtained have a strong cube texture and uniform microstructure. This coating and annealing process was repeated to get the desired buffer layer thickness. On these all-solution single buffer layer substrates, YBCO films were grown using pulsed laser deposition process. Critical current density about 2 MA/cm2 at 77 K and self-field has been obtained on these samples. Continuous processing of these substrates and processing of high Ic YBCO films on them will be discussed.

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Applied Superconductivity, IEEE Transactions on  (Volume:13 ,  Issue: 2 )