Enhanced multiferroic properties and tunable magnetic behavior in multiferroic BiFeO3-Bi0.5Na0.5TiO3 solid solutions |
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Authors: | ZM TianYS Zhang SL Yuan MS WuCH Wang ZZ MaSX Huo HN Duan |
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Affiliation: | School of Physics, Huazhong University of Science and Technology, Wuhan 430074, PR China |
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Abstract: | A series of multiferroic (1−x)BiFeO3−x(Bi0.5Na0.5)TiO3 (BF-BNT) (x = 0 − 0.6) solid solution ceramics were prepared by a sol-gel method. The XRD results show that increasing BNT content induce a gradual phase transformation from rhombohedral to pseudocubic structure near x = 0.4. Compared with pure BiFeO3, superior multiferroic properties are obtained for x = 0.3 with remnant polarization Pr = 1.49 μC/cm2 and saturated magnetization Ms = 0.51 emu/g. Importantly, the paramagnetic (PM) to ferromagnetic (FM) transition is observed for the solutions, and the Curie temperature (TC) can be tuned by varying the content of BNT. This observed FM ordering is discussed in terms of the possible existence of the long-range superexchange interaction of Fe3+-O-Ti-O-Fe3+ in the chemically ordered regions. |
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Keywords: | Ferroelectrics Multiferroic Ferromagnetic |
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