Crystalline growth rate and microstructure in YBaCuO thin films (original) (raw)

The in¯uence of the anisotropy of the crystalline growth rate on the microstructure and morphology of YBaCuO thin ®lm deposited by laser ablation is studied by means of transmission electron microscopy. The results obtained from high resolution lattice imaging and large angle convergent beam diraction, together with the investigations of the thin ®lm surface morphology show the strong in¯uence of the dierent crystalline growth rates on both the internal stress present in the YBaCuO ®lm and the roughness of the outer surface. These results should be of prime importance for the superconducting properties. This is an essential in tailoring these thin ®lms for device applications.