Photovoltaic Effect On Batio <sub> 3 </ Sub> Thin Film Ferroelectric Properties

With the pervasive demand for nano materials by the development of technology, the nano-size ferroelectric thin film,because of its good ferroelectric, pyroelectric, piezoelectric and nonlinear optical properties and other characteristics, has a wide range of potential applications in some aspects like optical devices, sensors, tunable microwave components and ultrahigh-density memory devices. At the same time, it becomes an important research of the nano science at present.This article simulates the ferroelectric properties of a model of ABO₃ thin film sandwiched between metal electrodes based on the Time Dependent Ginzburg-Landau(TDGL)equation. We discuss how the photovoltaic effect affect the ferroelectric properties of nanoscale ABO₃ thin film and the external mechanical loads have been found to significantly control the photovoltaic effect. The simulation results show that the size effect has a remarkable influence on the photocurrent of the thin film whose magnitude can be controlled by the external condition such as the mechanical loads.