The properties of ferroelectric films at small dimensions

This paper reviews the literature on size effects in ferroelectric material s, with an emphasis on thin film perovskite ferroelectrics. The roles of bo undary conditions, defect chemistry, electrode interfaces, surface layers, and microstructure in controlling the measured properties of ferroelectric films, as well as the observed deviation from bulk properties are discussed . Examples of the manifestation of size effects in terms of the low and hig h field dielectric properties, the piezoelectric effect, and the leakage be havior of films are given.