Effect of Thickness on Some Physical Properties of α-Fe2O3 Thin FilmsPrepared by PLD

Abstract

The effect of thickness variation on some physical properties ofhematite α-Fe2O3 thin filmswas investigated.An Fe2O3 bulk in the form of pellet was prepared by cold pressing of Fe2O3 powder with subsequent sintering at 800℃. Thin films with various thicknesses were obtained on glass substrates by pulsed laser deposition technique. The films properties were characterized by XRD, and FT-IR. The deposited iron oxide thin films showed a single hematite phase with polycrystalline rhombohedral crystal structure .The thickness of films were estimated by using spectrometer to be (185-232) nm. Using Debye Scherrerś formula, the average grain size for the samples was found to be (18-32) nm. Atomic force microscopy indicated that the films had smooth surfaces, with a lateral grain shape. The optical absorption of the films was determined from spectrophotometric measurements.