Structure, ferroelectric properties, and magnetic properties of the La-doped bismuth ferrite
2008; American Institute of Physics; Volume: 103; Issue: 7 Linguagem: Inglês
10.1063/1.2839325
ISSN1520-8850
AutoresZhenxiang Cheng, A. H. Li, Xiaolin Wang, Shi Xue Dou, K. Ozawa, Hideo Kimura, Shujun Zhang, Thomas R. Shrout,
Tópico(s)Advanced Condensed Matter Physics
ResumoBi 1 − x La x Fe O 3 ceramics with x=0, 0.1, 0.2, and 0.3 have been synthesized by solid state reaction, starting from metal oxides. A series of structure transformations is found to depend upon the doping level. Below 10% La doping, Bi1−xLaxFeO3 maintains the rhombohedral structure of BiFeO3. However, for Bi0.8La0.2FeO3 and Bi0.7La0.3FeO3, the structures change to the orthorhombic and tetragonal, respectively. La doping significantly reduces electric leakage and leads to successful observation of electrical polarization hysteresis loops. Doping with La also enhances the ferromagnetic moment, due to the broken cycloid spin structure caused by the changes in the crystalline structure.
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