Multiferroic composites consisting of Na_0.5Bi_0.5TiO₃(NBT) and NiFe₂O₄(NFO) phases have been synthesized by using sol-gel and metal-organic decomposition (MOD) methods. The X-ray diffraction (XRD) and scanning electron microscopy (SEM) results confirm NBT and NFO phase formation in all composite samples without the presence of any intermediate phases. The phonon vibrational modes of the composite samples are detected by Raman spectroscopy over wavenumber regions from 100 to 1000 cm⁻¹ at room temperature. The dielectric constant and dielectric losses are measured over a wide range of frequencies from 1 kHz to 1 MHz at room temperature. Room temperature magnetization measurements confirm the ferromagnetic behavior of all the composite samples. The observed values of coercivity are significantly lower and lie between 9.5 and 49 Oe only, which signifies the soft magnetic behavior of samples. The highest leakage current density value (3.39 × 10⁻⁶) has been observed for 50NBT-50NFO composite in I–V measurements. The present study reveals that NBT-NFO composites could be potential lead-free multiferroic composites and provide an alternative for designing environment-friendly devices.

采用溶胶-凝胶法和金属有机分解法制备了由Na _0.5 Bi _0.5 TiO ₃（NBT）和NiFe ₂ O ₄（NFO）相组成的多铁复合材料。X射线衍射（XRD）和扫描电子显微镜（SEM）结果证实了所有复合材料样品中均不存在NBT和NFO相。通过拉曼光谱在100至1000 cm ^-1的波数区域上检测复合样品的声子振动模式在室温下。在室温下，在从1 kHz到1 MHz的宽范围频率上测量介电常数和介电损耗。室温磁化强度测量证实了所有复合样品的铁磁性能。观察到的矫顽力值明显较低，仅在9.5和49 Oe之间，这表明样品的软磁行为。在IV测量中，已观察到50NBT-50NFO复合材料的最高泄漏电流密度值（3.39×10 ^-6）。本研究表明，NBT-NFO复合材料可能是潜在的无铅多铁性复合材料，并为设计环保设备提供了替代方法。