Effects of Fe Substitution on the Structural and Magnetic Properties of CuBO2 Delafossite Oxide
Sornamol Traiphop and Teerasak Kamwanna** Author for corresponding; e-mail address: teekam@kku.ac.th
Volume: Vol.47 No.4 (Special Issue II : July 2020)
Research Article
DOI:
Received: 25 July 2019, Revised: -, Accepted: 24 January 2020, Published: -
Citation: Traiphop S. and Kamwanna T., Effects of Fe Substitution on the Structural and Magnetic Properties of CuBO2 Delafossite Oxide, Chiang Mai Journal of Science, 2020; 47(4): 665-672.
Abstract
Fe-doped CuBO2 delafossite oxides were synthesized using a conventional solid-state reaction method. The influence of the Fe concentration (0–3%) on its microstructural, optical and magnetic properties was investigated. X-ray diffraction (XRD) analysis results revealed the delafossite structure in all the samples. Lattice spacing of CuB1-xFexO2 samples increased with Fe concentration. Optical properties measured at room temperature by UVvisible spectroscopy showed a weak absorption in the visible light and near IR regions. The corresponding direct optical band gap was about 3.01 eV. Magnetic hysteresis curve measurements showed that the Fe-doped CuBO2 samples exhibited ferromagnetic behavior at room temperature. The magnetization of this CuB1-xFexO2 delafossite greatly increased with the Fe content. This indicated that the combined influence of the number of B3+−Fe3+ pairs and long-range interaction of B3+−Fe3+ coupling produced a mixed effect on the magnetic properties of CuBO2 delafossite oxide. The Curie temperature suggests that ferromagnetism originates from CuB1-xFexO2 matrices.