Atomic force microscopy (AFM) is applied to study the surface morphologies
and growth mechanisms of sputtered SrTiO3 films on single-crystal MgO(100)
substrates. Meanwhile, surface morphologies of as-polished and post-anneale
d MgO(100) substrates are investigated as well. Effects of the miscut (or m
isorientation) of the substrate surface on morphologies and growth mechanis
ms are discussed. For comparison, a typical surface morphology and growth m
echanism of the spiral island structure in sputtered PrBa2Cu3O7-delta films
on MgO(100) substrates are presented.