Figure 7From: Optical properties of epitaxial BiFeO3 thin film grown on SrRuO3-buffered SrTiO3 substratePlot of ( α▪E )nvs photon energy E . (a) n = 2 and (b) n = 1/2. The plots suggest that the BFO has a direct bandgap of 2.68 eV.Back to article page