Multiferroic and magnetoelectric properties of La0.1Ba0.9Fe12O19 ceramics
Multiferroic and magnetoelectric properties of La0.1Ba0.9Fe12O19 ceramics
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DOI：
10.1007/s11434-014-0466-4
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发表时间：
2014-06
影响因子：
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通讯作者：
G. Tan;Wenrong Wang;Wei Li;Limin Liu
中科院分区：
文献类型：
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作者：
G. Tan;Wenrong Wang;Wei Li;Limin Liu
La0.1Ba0.9Fe12O19powders with similar hexagonal crystal structure to BaFe12O19have been successfully synthesized using polymer precursor method. The powders were suppressed into pellets, which were sintered into ceramics at 1,300 °C for 1 h. The structure and morphology of the ceramics have been determined by X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM). Clear electric hysteresis loops upon different amplitude of external fields indicates that La0.1Ba0.9Fe12O19is a kind of possible ferroelectric compound. The maximum remnant polarization of La0.1Ba0.9Fe12O19ceramic is estimated to be ~9.6 μC/cm2. The FeO6octahedron in its perovskite-like hexagonal unit cell as well as the shift of Fe3+off the center of octahedron are proposed to be the origin of electric polarization in La0.1Ba0.9Fe12O19. Simultaneous occurrence of large ferroelectricity and strong ferromagnetism has been observed in La0.1Ba0.9Fe12O19ceramics. More interestingly, this compound demonstrates electronic polarization behavior being actuated by an applied magnetic field, indicating the existence of magnetoelectric (ME) coupling effect in the La0.1Ba0.9Fe12O19ceramics. Our results may lead to new device applications such as magnetically recorded ferroelectric memory.
