Optical and magnetic properties of KBiFe₂O₅ thin films fabricated by chemical solution deposition

KBiFe₂O₅ thin films grown on quartz substrates by a chemical solution deposition method have been investigated by means of optical and magnetic measurements. The effects of synthesized temperature and the molar ratios of K/Bi on the phase formation of KBiFe₂O₅ thin film were assessed. Microstructural characterizations using X-ray diffraction and scanning electron microscopy indicate that the sample annealed at 750°C shows better crystallinity. Optical transmittance measurement and magnetization curves show optical and magnetic tunability of KBiFe₂O₅ thin film with increasing growth temperature, respectively, where the possible physical mechanisms were provided and discussed. These results are helpful in the deeper understanding of relation between crystal structure and physics in perovskite-like oxides and show the potential role, such materials can play, in solar-energy devices and multiferroic applications.