TY - JOUR
T1 - Enhanced ferroelectricity, piezoelectricity, and ferromagnetism in Nd-modified BiFeO3-BaTiO3lead-free ceramics
AU - Zheng, Qiaoji
AU - Luo, Lingling
AU - Lam, Kwok Ho
AU - Jiang, Na
AU - Guo, Yongquan
AU - Lin, Dunmin
PY - 2014/1/1
Y1 - 2014/1/1
N2 - � 2014 AIP Publishing LLC. Lead-free multiferroic ceramics of 0.75Bi1-xNdxFeO3-0.25BaTiO3+1mol. % MnO2were 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 Prof 16.5-17.5 μC/cm2, d33of 113-121 pC/N, Mrof 0.127-0.138emu/g, R of ∼5�109Ω�cm and high TCof 473-482�C, indicating that the ceramic is a promising candidate for room-temperature multiferroic and high-temperature piezoelectric materials.
AB - � 2014 AIP Publishing LLC. Lead-free multiferroic ceramics of 0.75Bi1-xNdxFeO3-0.25BaTiO3+1mol. % MnO2were 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 Prof 16.5-17.5 μC/cm2, d33of 113-121 pC/N, Mrof 0.127-0.138emu/g, R of ∼5�109Ω�cm and high TCof 473-482�C, indicating that the ceramic is a promising candidate for room-temperature multiferroic and high-temperature piezoelectric materials.
UR - http://www.scopus.com/inward/record.url?scp=84922464975&partnerID=8YFLogxK
U2 - 10.1063/1.4901198
DO - 10.1063/1.4901198
M3 - Journal article
SN - 0021-8979
VL - 116
JO - Journal of Applied Physics
JF - Journal of Applied Physics
IS - 18
M1 - 184101
ER -