Chemical Solution Deposition of La-Substituted BiFe0.5Sc0.5O3 Perovskite Thin Films on Different Substrates

Abstract

In the present work, polycrystalline Bi0.67La0.33Fe0.5Sc0.5O3 thin films were synthesized using a simple and cost-effective chemical solution deposition process employing the spin coating technique. In order to check the feasibility of the fabrication of thin films on various types of substrates, the films were deposited on Pt-coated silicon, silicon, sapphire, corundum, fused silica and glass. Based on the results of thermogravimetric analysis of precursor and thermal stability study, it was determined that the optimal annealing temperature for the formation of perovskite structure is 600 °C. It was observed that the relative intensity of the pseudocubic peaks (001)p and (011)p in the XRD patterns is influenced by the nature of substrates, suggesting that the formed crystallites have some preferred orientation. Roughness of the films was determined to be dependent on the nature of the substrate.

Functional Ferroic Materials, Films and Devices

“…Therefore, two-dimensional (2D) ferroelectric thin films with smooth surfaces and stable polarization are promising for the development of electronic applications. For example, Griesiute et al obtained La-substituted BiFe 0.5 Sc 0.5 O 3 perovskite thin films with different crystal structures and roughness through fabricating films on different substrates [6]. Similarly, Magalhaes et al grew Na 0.5 Bi 0.5 TiO 3 (NBT)-based epitaxial films on different single crystalline substrates and found that the films showed excellent ferroelectric and dielectric properties (Pr = 1.2 µC/cm 2 , Ec = 58 kV/cm for 1 µm-NBT-BT films), and the roughness of films strongly was found to depend on film thickness [7].…”