Abstract
Structural and optical characterization of sol-gel assisted spin coated ErFeO3 thin film is demonstrated. ErFeO3 thin film is deposited on quartz substrate at 3000 rpm from the sol prepared using metal nitrates dissolved into suitable solvents at a pH level of 2–3. X-ray diffraction and Raman spectroscopy analysis confirmed the perovskite orthorhombic structure of ErFeO3 thin film with a space group of D2h16 – Pbnm. Debye-Scherrer’s equation was employed on the strong XRD peak and average crystallite size was calculated to be 73 nm. A compressive strain of −13.66% was recorded from XRD data. The Raman modes are found shifted from the standard reported literature, which are due to the substrate induced strain in the deposited film. AFM investigations have shown good quality of the ErFeO3 thin film with average roughness of 18 nm and grain size of 410 nm. From the optical measurement, the film transmittance in 300–1000 nm range was 60–75% and the optical bandgaps of ErFeO3 is calculated to be 3.8 eV.
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