Biaxially textured yttria stabilized zirconia buffer layers on rotating cylindrical surfaces

Abstract
Biaxially textured yttria stabilized zirconia (YSZ) buffer layers are prepared on rotating cylindrical surfaces by an ion-beam-assisted deposition (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 rotation velocity. The best in-plane textures achieved so far with a full width half maximum (FWHM) value of 27° are sufficient for the preparation of YbaCuO films with critical current densities above 105 A cm−2 at 77 K and self-fields.