Abstract
Lead-free multiferroic ceramics of 0.75Bi1−x Er x FeO3–0.25BaTiO3 + 1 mol% MnO2 were synthesized by a conventional ceramic technique, and their structure, piezoelectric, ferroelectric and ferromagnetic properties were investigated. All the ceramics possess a perovskite structure. The crystal structure of the ceramics is transformed from rhombohedral to orthorhombic phase with increasing x. The ceramics with x = 0.125–0.15 exhibit good electric insulation (R = 2.75–2.83 × 1010 Ω cm) and strong ferroelectricity (P r = 13.4–14.2 µC cm−2). The remanent magnetism M r and saturated magnetization M s of the ceramics are greatly improved by 380 and 722 % with increasing x from 0 to 0.15, respectively. The present materials exhibit strong ferroelectricity, considerable improved ferromagnetism and relatively good piezoelectricity, suggesting potential applications in advanced multiferroic devices.
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This work was supported by National Nature Science Foundation of China (Grant No. 51572178), Education Department of Sichuan Province (15ZA0037 and 15ZB0032) and Science and Technology Bureau of Sichuan Province (2014JY0040).
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Guo, Y., Wang, T., He, L. et al. Enhanced ferroelectric and ferromagnetic properties of Er-modified BiFeO3–BaTiO3 lead-free multiferroic ceramics. J Mater Sci: Mater Electron 27, 5741–5747 (2016). https://doi.org/10.1007/s10854-016-4487-4
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DOI: https://doi.org/10.1007/s10854-016-4487-4