BI2WO6 GROWTH ON LSAT (100) USING PULSED LASER DEPOSITION (PLD)

• Main Author: Finesya, Rizka
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/80778
• Institution: Institut Teknologi Bandung

Ferroelectric materials are materials that have one of the ferroic properties, ferroelectric properties. The study of crystal structure, domain structure, and other nanoscale phenomena in ferroelectric materials is very important in the development of various fields, including data storage and sensing design. One of the ferroelectric materials that will be discussed in this research is bismuth tungstate oxide (Bi2WO6), or commonly called BWO. As a dielectric material, BWO have a spontaneous electric polarization when an electric field is applied. The direction of polarization can be manipulated by manipulating the direction of the electric current. In previous studies, it was found that there was an in-plane polarization of BWO thin films grown on STO substrates, but no out-of-plane polarization was found. In this research, BWO will be grown using pulsed laser deposition (PLD) method on a LaSrTaO (LSAT) substrate and growth on LSAT substrate that has been deposited with LaSrMnO3 (LSMO) as an electrode. Thin film surface analysis was carried out using FE-SEM and AFM characterization. Then additional measurements were carried out using XRD, PL, and RAMAN. Finally, polarization measurement was carried out using PFM to analyze the polarization of the material. From the measurement results, it can be concluded that BWO grown on the LSAT substrate has a surface in the form of a granule structure that is distributed evenly, and with the addition of LSMO as an electrode, a similar BWO surface structure is obtained. From the PFM measurement results, it was concluded that BWO has an in-plane polarization.