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- W2396610864 abstract "Ceramics of Bi1–xYxFeO3 solid solutions (x = 0.02, 0.07, and 0.10) have been prepared by mechanical activation followed by sintering. The effect of yttrium content on the structural, electrical, and optical properties of the materials has been studied. Thus, single-phase solid solutions with rhombohedral R3c structure have been achieved for x = 0.02 and 0.07, while for x = 0.10 the main R3c phase has been detected together with a small amount of the orthorhombic Pbnm phase. Multiferroic properties of the samples, studied by differential scanning calorimetry (DSC), showed that both TN and TC (temperatures of the antiferromagnetic–paramagnetic and ferroelectric–paraelectric transitions, respectively) decrease with increasing yttrium content. The nature of the ferroelectric–paraelectric transition has been studied by temperature-dependent X-ray diffraction (XRD), which revealed rhombohedral R3c to orthorhombic Pbnm phase transitions for x = 0.07 and 0.10. On the other hand, for x = 0.02 the high-temperature phase was indexed as Pnma. Optical properties of the samples, as studied by diffuse reflectance spectroscopy, showed low optical band gap that decreases with increasing yttrium content. Prepared ceramics were highly insulating at room temperature and electrically homogeneous, as assayed by impedance spectroscopy, and the conductivity increased with x." @default.
- W2396610864 created "2016-06-24" @default.
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- W2396610864 date "2015-10-02" @default.
- W2396610864 modified "2023-10-17" @default.
- W2396610864 title "Structural, Optical, and Electrical Characterization of Yttrium-Substituted BiFeO<sub>3</sub> Ceramics Prepared by Mechanical Activation" @default.
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- W2396610864 doi "https://doi.org/10.1021/acs.inorgchem.5b01654" @default.
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