BIAXIALLY TEXTURED YTTRIA-STABILIZED ZIRCONIA BUFFER LAYERS ON ROTATING CYLINDRICAL SURFACES

Biaxially textured yttria stabilized zirconia (YSZ) buffer layers are prepared on rotating cylindrical surfaces by an ion-beam-assisted depo sition (IBAD) process. A large fraction of the cylinder surface can be coated at the same time, resulting in an effective deposition rate of 40 nm/h for the whole tube circumference (diameter of the tube 12 mm) . The in-plane alignment depends on the total film thickness and the r otation velocity. The best in-plane textures achieved so far with a fu ll width half maximum (FWHM) value of 27 degrees are sufficient for th e preparation of YBaCuO films with critical current densities above 10 (5) A cm(-2) at 77 K and self-fields.