Coexistence of room temperature ferroelectricity and ferrimagnetism in multiferroic BiFeO3-Bi0.5Na0.5TiO3 solid solution |
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Authors: | ZM TianCH Wang SL Yuan MS WuZZ Ma HN DuanL Chen |
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Affiliation: | School of Physics, Huazhong University of Science and Technology, Wuhan 430074, PR China |
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Abstract: | The structure, ferroelectric and magnetic properties of (1 − x)BiFeO3-xBi0.5Na0.5TiO3 (x = 0.37) solid solution fabricated by a sol-gel method have been investigated. X-ray diffraction and Raman spectroscopy measurements show a single-phase perovskite structure with no impurities identified. Compared with pure BiFeO3, the coexistence of ferroelectricity and ferrimagnetism have been observed at room temperature for the solution with remnant polarization Pr = 1.41 μC/cm2 and remnant magnetization Mr = 0.054 emu/g. Importantly, a magnetic transition from ferrimagnetic (FM) ordering to paramagnetic (PM) state is observed, with Curie temperature TC ∼ 330 K, being explained in terms of the suppression of cycloid spin configuration by the structural distortion. |
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Keywords: | Ferroelectricity Ferrimagnetism BiFeO3 |
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