Journal
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
Volume 26, Issue 2, Pages 978-984Publisher
SPRINGER
DOI: 10.1007/s10854-014-2492-z
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Funding
- Science and Technology Bureau of Sichuan Province [2010JQ0046]
- State Key Laboratory of Electronic Thin Films and Integrated Devices of University of Electronic Science and Technology of China [KFJJ201108]
- Sichuan Normal University
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0.70Bi(1-x)La(x)FeO(3)-0.30BaTiO(3) + 1 mol% MnO2 multiferroic ceramics were prepared by using the solid state reaction and their phase structure, dielectric, ferroelectric and ferromagnetic properties were studied. All the ceramics possess perovskite structure and exhibit good insulation and densification. A morphotropic phase boundary of rhombohedral and tetragonal phases is formed at x = 0.02. As the concentration of La3+ is increased, the ferroelectric-paraelectric phase transition of the ceramics at Curie temperature becomes gradually more diffusive. A small amount of the substitution of La3+ for Bi3+ improves effectively the ferroelectricity of the ceramics and the optimum remanent polarization of 27.2 mu m/cm(2) reaches at x = 0.04. After the addition of La3+, the ferromagnetism of the ceramics is greatly enhanced and the remanent magnetization M-r monotonously increases from 0.0321 to 0.147 emu/g with x increasing from 0 to 0.10. Our results show that the ceramics possess simultaneously improved ferroelectric and ferromagnetic properties and may a promising candidate for room-temperature multiferroic materials.
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