Phase structure, piezoelectric and multiferroic properties of SmCoO3-modified BiFeO3-BaTiO3 lead-free ceramics

Jiang, N., Tian, M., Luo, L., Zheng, Q., Shi, D., Lam, K. H. , Xu, C. and Lin, D. (2016) Phase structure, piezoelectric and multiferroic properties of SmCoO3-modified BiFeO3-BaTiO3 lead-free ceramics. Journal of Electronic Materials, 45(1), pp. 291-300. (doi: 10.1007/s11664-015-4062-4)

Abstract

(0.75−x)BiFeO3-0.25BaTiO3-xSmCoO3 + 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 960°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 × 109 Ω cm to 2.1 × 109 Ω cm), piezoelectricity (d 33 ∼ 65 pC/N to 106 pC/N) and ferroelectricity (P r ∼ 6.38 μC/cm2 to 22.89 μC/cm2) 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.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Lam, Dr Koko
• Authors: Jiang, N., Tian, M., Luo, L., Zheng, Q., Shi, D., Lam, K. H., Xu, C., and Lin, D.
• College/School: College of Science and Engineering > School of Engineering > Systems Power and Energy
• Journal Name: Journal of Electronic Materials
• Publisher: Springer
• ISSN: 0361-5235

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