Liquid phase enhanced hybrid MOD approach for high performance YBCO films development

High performance YBCO films have been realized through MOD approach by hybrid of Ba-TFA with TMAP (trimethylacetates with propionic). High I/sub c/ over 140 A/cm-w and high J/sub c/ up to 2.4 MA/cm/sup 2/ at 77 K for 0.6 /spl mu/m YBCO films on RABiTS have been shown on un-bridged and bridged samples. Texture characterizations performed in XRD four-circle diffractometer confirmed well-aligned YBCO grains with a volume fraction of cubic phase /spl sim/95%. T/sub c/ measurements showed sharp transitions in less than 1 K and zero resistance above 90 K. The formation of YBCO phase follows the mechanism of interface island nucleation and epitaxial growth. The liquid phase in the precursor enhances Y123 epi-growth and accelerates the conversion process.