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Effect of grain size on effective permittivity of ferroelectric films based on effective medium theory
Author(s)
Date Issued
January 1, 2014
Type
Conference Paper
Abstract
Based on effective medium theory, the temperature dependence of effective dielectric permittivity, εe(T), on core radius (a) and thickness (t) of non-ferroelectric dead layer (DL) on the surface of inhomogeneous grains of ferroelectric film made up of cylindrical ferroelectric grains was theoretically investigated. It was found that εe(T) increases with increasing core radius but decreases with increasing DL thickness. In this work, an equation expressing the relationship among εe, a and t was derived. This equation is very useful for the preparation of a ferroelectric film to desired properties. © (2014) Trans Tech Publications, Switzerland.
Citation
Applied Mechanics and Materials, 619, 188-192, 2014