Ferroelectric and magnetic properties in high-pressure synthesized BiFeO3 compound
Ferroelectric and magnetic properties in high-pressure synthesized BiFeO3 compound
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DOI：
10.1016/j.jallcom.2011.04.046
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发表时间：
2011-07
影响因子：
6.2
通讯作者：
L. Zhai;Y. Shi;Jinlong Gao;S. Tang;Y. Du
中科院分区：
文献类型：
--
作者：
L. Zhai;Y. Shi;Jinlong Gao;S. Tang;Y. Du
采用高压退火法合成了高密度多晶BiFeO_3化合物。对样品进行了晶体结构、磁性和铁电性能的测试。结果表明，样品几乎为单相，具有扭曲的R3C结构。X射线光电子能谱分析表明，样品中Fe的氧化态为Fe3+。BiFeO_3的磁化强度随室温场的变化表现出滞后行为。观察到的弱铁磁性可归因于高压退火热处理引起的晶格畸变。此外，用压电响应力显微镜研究了样品的局域铁电性能。
High-density polycrystalline BiFeO3compound was synthesized by high-pressure annealing. Measurements of crystal structure, magnetic, and ferroelectric properties were made on the sample. It was found that the sample was almost single phase with a distortedR3cstructure. The results of the X-ray photoelectron spectra demonstrate that the oxidation state of Fe in the sample is Fe3+. The room-temperature field dependence of magnetization for BiFeO3exhibits a hysteretic behavior. The observed weak ferromagnetism could be ascribed to the lattice distortion induced by the high-pressure annealing. In addition, the local ferroelectric performance of the sample was studied by piezoresponse force microscopy.