Abstract
Bi(Mg3/8Fe2/8Ti3/8)O3 (BMFT) perovskite oxide ceramic has been synthesized by a conventional solid-state reaction method at ambient pressure. Structural characterization is detected by X-ray diffraction (XRD) and Raman spectroscopy, reflecting a polycrystalline perovskite structure. The peaks in XRD pattern shift toward lower angle, which indicates larger lattice constant than BiFeO3 (BFO). High frequency modes blue shift and the peak broadening can be observed clearly in micro-Raman spectroscopy compared with BFO patterns. Morphology analysis through scanning tunneling microscope shows dense and well-interlinked grains. Through the UV–Vis–NIR spectra, BMFT displays a narrow band gap of 2.23 eV, smaller than the 2.8 eV band gap of BFO. The room-temperature ferromagnetism of BMFT ceramic is measured for the first time, which can be attributed to the nonmagnetic ions of Mg2+ and Ti4+ ions replacing Fe3+ ions that causing the remanent magnetic moments. These results will open an avenue to further design multiferroic data storage and photovoltaic devices.
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This work was supported by the National Natural Science Foundation of China (61474045) and the State Key Basic Research Program of China (2013CB922300).
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Wang, T., Deng, H., Zhou, W. et al. Structural, ferromagnetic and optical properties of pure bismuth A-site polar perovskite Bi(Mg3/8Fe2/8Ti3/8)O3 synthesized at ambient pressure. J Mater Sci: Mater Electron 28, 934–938 (2017). https://doi.org/10.1007/s10854-016-5610-2
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DOI: https://doi.org/10.1007/s10854-016-5610-2