Study of multiferroic properties in Bi5Fe0.5Co0.5Ti3O15 thin films
Study of multiferroic properties in Bi5Fe0.5Co0.5Ti3O15 thin films
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DOI：
10.1063/1.4730892
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发表时间：
2012-06
影响因子：
3.2
通讯作者：
Hui Sun;Xiaomei Lu;Tingting Xu;J. Su;Yaming Jin;Changcheng Ju;F. Huang;Jinsong Zhu
中科院分区：
文献类型：
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作者：
Hui Sun;Xiaomei Lu;Tingting Xu;J. Su;Yaming Jin;Changcheng Ju;F. Huang;Jinsong Zhu
为了探索室温下具有多铁性的新型薄膜，采用化学溶液沉积法制备了铋层状结构的Bi 5 Fe 0. 5Co 0. 5 Ti 3 O 15（BFCT）薄膜。研究了BFCT薄膜的微观结构、电学和磁学性能。在300 kV/cm的电场下，BFCT薄膜在1 kHz时的剩余极化（2 Pr）为31.7 μC/cm 2。为了排除漏电流对极化的贡献，我们研究了磁滞回线在100 Hz至2 kHz范围内对测量频率的依赖性，并在BFCT薄膜中进行了正向上负向下（PUND）测量。结果表明，BFCT薄膜具有本征铁电特性，漏电流对薄膜的铁电性能影响不大。同时，BFCT薄膜的介电-V曲线也支持了BFCT薄膜的自然铁电性。我们还发现，BFCT薄膜显示出弱的铁磁性与饱和磁化强度（Ms）约为2.6 emu/cm 3。更进一步...
To explore the novel thin film with multiferroicity at room temperature, the bismuth-layer-structured Bi5Fe0.5Co0.5Ti3O15 (BFCT) thin films were prepared using chemical solution deposition technique. The microstructure, electric, and magnetic properties were investigated in BFCT film. A defined hysteresis loop of the BFCT film was obtained with the remnant polarization (2Pr) ∼ 31.7 μC/cm2 at 1 kHz under the electric field 300 kV/cm. To exclude contribution of the leakage current to polarization, we studied the dependence of hysteresis loops on the measuring frequency in the range from 100 Hz to 2 kHz and made the positive-up-negative-down (PUND) measurements in BFCT thin film. Both the results indicate the intrinsic ferroelectric property, and the leakage current does not play a big role in BFCT film. Meanwhile, the ɛ-V curve can also support the natural ferroelectricity in the BFCT film. We also found that the BFCT film shows weak ferromagnetism with the saturated magnetization (Ms) ∼2.6 emu/cm3. Further...