Journal of Electronic Materials

, Volume 45, Issue 1, pp 291–300 | Cite as

Phase Structure, Piezoelectric and Multiferroic Properties of SmCoO3-Modified BiFeO3-BaTiO3 Lead-Free Ceramics

  • Na Jiang
  • Mijie Tian
  • Lingling Luo
  • Qiaoji Zheng
  • Dongliang Shi
  • Kwok Ho LamEmail author
  • Chenggang Xu
  • Dunmin LinEmail author


(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.


Lead-free ceramics BiFeO3 phase transitions piezoelectric properties multiferroic 


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This work was supported by the projects of Education Department of Sichuan Province (15ZA0037, 15ZB0032), and Science and Technology Bureau of Sichuan Province (2014JY0040). It was also partially supported from The Hong Kong Polytechnic University (1-ZVCG, 4-ZZDC).


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Copyright information

© The Minerals, Metals & Materials Society 2015

Authors and Affiliations

  • Na Jiang
    • 1
  • Mijie Tian
    • 1
  • Lingling Luo
    • 1
  • Qiaoji Zheng
    • 1
  • Dongliang Shi
    • 2
  • Kwok Ho Lam
    • 2
    Email author
  • Chenggang Xu
    • 1
  • Dunmin Lin
    • 1
    Email author
  1. 1.College of Chemistry and Materials ScienceSichuan Normal UniversityChengduChina
  2. 2.Department of Electrical EngineeringThe Hong Kong Polytechnic UniversityHunghomHong Kong

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