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Title: | Enhanced ferroelectricity, piezoelectricity, and ferromagnetism in Nd-modified BiFeO3-BaTiO3 lead-free ceramics | Authors: | Zheng, Q Luo, L Lam, KH Jiang, N Guo, Y Lin, D |
Issue Date: | 2014 | Source: | Journal of applied physics, 2014, v. 116, no. 18, 184101, p. 184101-1-184101-11 | Abstract: | Lead-free multiferroic ceramics of 0.75Bi1-xNdxFeO3-0.25BaTiO3+1mol. % MnO2 were prepared by a conventional ceramic technique and their structure, piezoelectricity, and multiferroicity were studied. The ceramics sintered at 890-990°C possess a pure perovskite structure. A morphotropic phase boundary of rhombohedral and monoclinic phases is formed at x=0.05. A small amount of Nd improves the ferroelectric and piezoelectric properties of the ceramics. The ferroelectric-paraelectric phase transition becomes gradually diffusive with x increasing. After the addition of Nd, the ferromagnetism of the ceramics is greatly enhanced by ∼320%. The increase in sintering temperature improves significantly the ferroelectric, piezoelectric, and ferromagnetic properties of the ceramics. The ceramics with x=0.05 sintered at 950-990°C possess improved ferroelectricity, piezoelectricity, magnetism and insulation with Pr of 16.5-17.5 μC/cm2, d33 of 113-121 pC/N, Mr of 0.127-0.138emu/g, R of ∼5×109 Ω·cm and high TC of 473-482°C, indicating that the ceramic is a promising candidate for room-temperature multiferroic and high-temperature piezoelectric materials. | Publisher: | American Institute of Physics | Journal: | Journal of applied physics | ISSN: | 0021-8979 | EISSN: | 1089-7550 | DOI: | 10.1063/1.4901198 | Rights: | © 2014 AIP Publishing LLC. This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Q. Zheng et al., J. Appl. Phys. 116, 184101 (2014) and may be found at https://dx.doi.org/10.1063/1.4901198 |
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Zheng_Enhanced_Ferroelectricity_Piezoelectricity.pdf | 3.12 MB | Adobe PDF | View/Open |
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