Structure of BiFeO_3 ceramics treated with hot-pressing

Su W.N.; Wu X.L.; Wu X.S.Wang D.H.Du Y.W.Chu P.K.

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Structure of BiFeO_3 ceramics treated with hot-pressing

机译：Structure of BiFeO_3 ceramics treated with hot-pressing

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BiFeO_3 ceramics synthesized at high temperature and pressure is observed to possess large spontaneous polarization and magnetism. The selected-area electron diffraction patterns indicate the coexistence of polycrystalline and nanocrystalline grains in the hot-pressed samples. Raman spectroscopic studies reveal that the BiO bond strain and cations (Fe ~(3+)) away from the oxygen octahedral center induce the polarization. The FeO bond strain, oxygen octahedral rotation around the 111 axis, and electromagnons build a long-range interaction between electrical polarization and magnetic moment reorientation to form an incommensurate spiral magnetic structure. This work clearly shows that the hot-pressed treatment can modify the structure and properties of BiFeO_3 ceramics.

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来源
《Solid State Communications》 |2010年第1期|5-8|共4页
作者
Su W.N.; Wu X.L.; Wu X.S.Wang D.H.Du Y.W.Chu P.K.;
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作者单位

National Laboratory of Solid State Microstructures, Department of Physics, Nanjing University, Nanjing 210093, China;

Department of Physics and Materials Science, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong;

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正文语种英语
中图分类固体物理学;
关键词
A. Incommensurate spiral magnetic structure; A. Polycrystalline structure; C. Polarization; D. Raman spectra;

Structure of BiFeO_3 ceramics treated with hot-pressing

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