Nano-particles of Co_0.5 Cu_0.5 Al_x Fe_2-x O₄ ferrite compounds with compositions (x = 0.0, 0.2, 0.4, 0.6, 0.8 and 1.0) were prepared using co-precipitation method. The IR spectra of the samples showed the main characteristic bands of the spinel ferrite. X-ray diffraction patterns confirmed the formation of a single spinel phase for all the samples except the compound with composition x = 0.4. The particle size of the samples confirmed the nano-size, which found in the range of 30–54 nm. The saturation magnetization and coercivity showed a decreasing trend with the increase of Al-content. The electrical and dielectric properties of the samples were investigated through the DC and AC measurements of the ferrite samples. Moreover, dielectric properties of the samples, such as dielectric constant, dielectric loss, and loss tangent, exhibited decreasing behavior with the increase of frequency, which explained in terms of the possible polarization process in ferrite.

Co _0.5 Cu _0.5 Al _x Fe _2-x O _4的纳米颗粒使用共沉淀法制备组成为（x = 0.0、0.2、0.4、0.6、0.8和1.0）的铁氧体化合物。样品的红外光谱显示出尖晶石铁氧体的主要特征谱带。X射线衍射图证实，除组成x ＝ 0.4的化合物外，所有样品均形成单一的尖晶石相。样品的粒径证实了纳米尺寸，其范围为30–54 nm。随着Al含量的增加，饱和磁化强度和矫顽力呈下降趋势。通过对铁氧体样品进行直流和交流测量，研究了样品的电和介电性能。此外，样品的介电性能，例如介电常数，介电损耗和损耗角正切，随着频率的升高表现出下降的行为，