Effects of lanthanum doping on the preferred orientation, phase structure and electrical properties of sol-gel derived Pb1-3x/2Lax (Zr0.6Ti0.4)O3 thin films

▶ Lanthanum doping is favorable to enhance crystalline and obtain (1 0 0)-preferred orientation of the films. ▶ The films undergo a structure change from “rhombohedral” phase to monoclinic phase as the lanthanum-doped content is increased to x ≈ 0.05. ▶ Lanthanum doping contributes to improve film dielectric constant and dielectric loss while it brings about a strikingly decreasing remnant polarization value.