Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/27832
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
Publisher: American Institute of Physics
Source: Journal of applied physics, 2014, v. 116, no. 18, 184101 How to cite?
Journal: Journal of applied physics 
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.
URI: http://hdl.handle.net/10397/27832
ISSN: 0021-8979
EISSN: 1089-7550
DOI: 10.1063/1.4901198
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