For the FTIR measurements, a Shimadzu FTIR spectrometer working in the mid-infrared range from 400 to 4000 cm−1 was used. The spectrum was acquired in transmittance mode with a resolution of 1 cm−1. Figure 5 shows FTIR spectra of α-Fe2O3 thin film deposited at temperature 303 K. In the region below 700cm−1 two absorption peaks at 617.22 and 455.20 cm−1 corresponding to the metal-oxygen (Fe-O) vibration modes of the spinel compound are observed. These two Fe-O peaks are sharp and prominent and are in good agreement with literature [9, 34]. The absorption peaks at 717.52 and 952.84 cm-1 may be attributed to