(Invited) Fabrication and Dielectric Properties of BaTiO3 Thin Films on Polycrystalline Ni Foils

Abstract

The BaTiO3 (BTO) thin films were deposited on polycrystalline Ni foils using a chemical solution approach, polymer-assisted deposition. We show that the interface between the BTO film and the Ni foil plays a critical role in determining the dielectric and ferroelectric properties of this flexible assembly. A pretreatment process of nickel foils with hydrogen peroxide (H2O2) solution has been conducted to form thin nickel oxide layers on the surfaces for the growth of BTO films. A rapid thermal post-annealing in oxygen would also strongly affect the electric properties of the as-prepared thin films. The growth dynamics was systematically studied to optimize the single phase BTO films with good dielectric and ferroelectric properties.