Multiferroic and magnetoelectric properties of Bi1−xBaxFe1−xMnxO3 system
Multiferroic and magnetoelectric properties of Bi1−xBaxFe1−xMnxO3 system
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DOI：
10.1088/0022-3727/42/20/205402
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发表时间：
2009-09
期刊：
影响因子：
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通讯作者：
L. Yin;W. Song;X. Jiao;W. B. Wu;X. B. Zhu;Z. R. Yang;J. Dai;R. Zhang;Y. Sun
中科院分区：
文献类型：
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作者：
L. Yin;W. Song;X. Jiao;W. B. Wu;X. B. Zhu;Z. R. Yang;J. Dai;R. Zhang;Y. Sun
采用固相合成法合成了多铁化合物Bi1−xBaxFe1−xMnxO3(0.2⩽x⩽0.5)。X-射线衍射分析表明，在x=0.4时，Bi1-−xBaxFe1-−xMnxO3为单相。这些样品在室温下同时表现出磁性和铁电性。在Bi0.8Ba0.2Fe0.8Mn0.2O样品中，由于本征磁电耦合效应，样品的磁极化显著增强，在磁相变(TC)附近出现介电反常。样品的室温介电常数随外加磁场的增加而减小，耦合系数(ε‘(H)−ε’(0))/ε‘(0)在H=6kOe时达到−0.2%。
Multiferroic compounds Bi1−xBaxFe1−xMnxO3 (0.2 ⩽ x ⩽ 0.5) have been synthesized by conventional solid-state reaction. X-ray diffraction shows that Bi1−xBaxFe1−xMnxO3 is single phase up to x = 0.4. These samples exhibit magnetism and ferroelectricity simultaneously at room temperature. A considerable enhancement of the polarization on magnetic poling and a dielectric anomaly near the magnetic transition (TC) due to the intrinsic magnetoelectric coupling effect are observed in the Bi0.8Ba0.2Fe0.8Mn0.2O3 sample. The dielectric constant for the Bi0.8Ba0.2Fe0.8Mn0.2O3 sample at room temperature decreases with increasing applied magnetic fields, and the coupling coefficient (ε′(H) − ε′(0))/ε′(0) reaches −0.2% at H = 6 kOe.