Ferroelectric–magnetic composites of SrBi2Nb2O9–CoFe2O4 (SBN–CFO) were synthesized via conventional solid state reaction route. The powder X-ray diffraction, Raman spectroscopy and scanning electron microscopy measurements confirm the existence of two chemically separated phases and phase purity in the SBN–CFO composites. Magnetization measurements confirm the enhanced values of the magnetic parameters. The change in the area of the ferroelectric P vs. E loops with frequency confirms the enhanced ferroelectric nature of the SBN–CFO composites. The quantified maximum values of magnetoelectric coefficient (α) are observed from the P vs. E loop measurements in the influence of applied magnetic field and found to be 4.475 mV cm−1 Oe−1 at 688 Oe for SBN–0.1CFO and 3.389 mV cm−1 Oe−1 at 1000 Oe for SBN–0.2CFO composites, respectively. The shifting in the peaks of temperature-dependent dielectric maxima towards the higher temperature side confirms the relaxor behaviour in the SBN–CFO composite samples.

中文翻译：

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SrBi2Nb2O9-CoFe2O4 复合材料的结构、介电和磁电耦合分析

SrBi2Nb2O9-CoFe2O4（SBN-CFO）的铁电-磁性复合材料是通过传统的固态反应途径合成的。粉末 X 射线衍射、拉曼光谱和扫描电子显微镜测量证实了 SBN-CFO 复合材料中存在两种化学分离的相和相纯度。磁化测量证实了磁参数的增强值。铁电 P 与 E 环的面积随频率的变化证实了 SBN-CFO 复合材料增强的铁电性质。磁电系数 (α) 的量化最大值是从 P 与 E 回路测量中观察到的在施加磁场的影响下为 4.475 mV cm-1 Oe-1，SBN-0.1CFO 和 3.389 mV 在 688 Oe对于 SBN-0.2CFO 复合材料，cm-1 Oe-1 分别为 1000 Oe。