Phase Transitions, Dielectric and Ferroelectric Properties of Lead-free NBT-BT Thin Films

Ferroelectric perovskites based on Na0.5Bi0.5TiO3 (NBT) are considered among the most promising lead-free candidate materials to substitute Pb(Zr1-xTix)O3 (PZT) in devices de‐ signed to respect standards and environmental laws. Taking into account the toxicity of lead-based systems, there are numerous lead-free piezoelectric materials under investigation in worldwide spread laboratories for replacing PZT in future devices. Constant efforts are made to find viable replacements for all these materials containing harmful elements.