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Title: Phase structure, piezoelectric and multiferroic properties of SmCoO3-modified BiFeO3-BaTiO3 lead-free ceramics
Authors: Jiang, N
Tian, M
Luo, L
Zheng, Q
Shi, D
Lam, KH 
Xu, C
Lin, D
Keywords: Lead-free ceramics
Phase transitions
Piezoelectric properties
Issue Date: 2016
Publisher: Springer
Source: Journal of electronic materials, 2016, v. 45, no. 1, p. 291-300 How to cite?
Journal: Journal of electronic materials 
Abstract: (0.75-x)BiFeO3-0.25BaTiO(3)-xSmCoO(3) + 1 mol.% MnO2 lead-free multiferroic ceramics were synthesized by a conventional ceramic fabrication technique. The effects of SmCoO3 on phase structure, piezoelectricity and multiferroicity of the ceramics were studied. All the ceramics can be well sintered at a low sintering temperature of 960A degrees C. The crystalline structure of the ceramics is transformed from rhombohedral to tetragonal symmetry with increasing the amount of SmCoO3. A morphotropic phase boundary of rhombohedral and tetragonal phases is formed at x = 0.01-0.04. A small amount of SmCoO3 is shown to improve the ferroelectric, piezoelectric and magnetoelectric properties of the ceramics. For the ceramics with x = 0.01-0.03, enhanced resistivity (R 1.2 x 10(9) Omega cm to 2.1 x 10(9) Omega cm), piezoelectricity (d (33) 65 pC/N to 106 pC/N) and ferroelectricity (P (r) 6.38 mu C/cm(2) to 22.89 mu C/cm(2)) are obtained. The ferromagnetism of the materials is greatly enhanced by the doping of SmCoO3 such that a very high magnetoelectric coefficient of 742 mV/(cm Oe) is obtained at x = 0.01, suggesting a promising potential in multiferroic devices.
ISSN: 0361-5235 (print)
1543-186X (online)
DOI: 10.1007/s11664-015-4062-4
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