Low-Temperature Preparation of Pb(Zr, Ti)O3 Thin Films on (Pb, La)TiO3 Buffer Layer by Multi-Ion-Beam Sputtering

Abstract
Ferroelectric lead-zirconate-titanate (PZT) thin films were successfully fabricated by the multi-ion-beam sputtering technique in an oxygen ambient at a low substrate temperature of 415°C. By inserting lead-lanthanum-titanate (PLT) buffer layers between substrates and PZT films, the perovskite-PZT thin films could be epitaxially grown on (100)MgO, (100)Pt/MgO and (111)Pt/Ti/SiO2/Si substrates. These films, even at thickness values of as low as 630 Å, showed excellent ferroelectric properties with a remanent polarization of 20 µC/cm2, coercive field of 200 kV/cm, and a relative dielectric constant of 700.