Recent advances made in the field of pulsed laser deposited superlatti
ces made up of perovskite oxides are reviewed. The superconducting pro
perties and the effect of adjacent layers in ultra-thin YBCO are studi
ed in YBCO/(PrxY1-x)BCO superlattices. We describe the effects of laye
ring in (La0.7Ba0.3)MnO3 for the purposes of fundamental studies and p
ossible applications of these newly recognized colossal magnetoresista
nce materials. (C) 1996 Academic Press Limited