Influences of surface transition layer on switching time and coercive field of a ferroelectric thin film

摘要

Based on the Landau-Khalatnikov equation of motion, we first study the properties of polarization reversal in a ferroelectric thin film with surface transition layers, which can reflect a more realistic situation compared to the previous treatments of the same problem using the so-called extrapolation length. The influence of the surface transition layer on switching time and coercive field under a step electric field is discussed in detail. The results show that the surface transition layer plays a crucial role in the properties of polarization reversal in a ferroelectric thin film.