In this study, the effect of vanadium addition on the structural and magnetic properties of cobalt ferrite (Co_1−xV_xFe₂O₄; where x = 0, 0.05, 0.10, 0.15, 0.20, and 0.25) prepared by a novel sol–gel autocombustion method was investigated. The formation of cubic spinel structure (space group Fd3m) was confirmed by X-ray diffraction in combination of Rietveld structure refinement analysis and transform infrared spectroscopic spectrum (FT-IR) analyses. Also, phase and elemental analyses confirmed that an inevitable secondary phase of hematite along with the spinel phase appears by addition of vanadium; therefore, a nanocomposite was formed in the sample containing vanadium. However, the SEM observations in combination of the results obtained by Rietveld structure refinement analysis showed that the presence of vanadium can affect the size of synthesized cobalt ferrite. VSM measurements showed that saturation magnetization and coercivity values are strongly dependent on the vanadium content and particle size, so that the maximum value of coercivity was obtained equal to ~916 Oe for Co_0.85V_0.15Fe₂O₄.

在这项研究中，钒的添加对 新型制备的钴铁氧体（Co _{1- x} V _x Fe ₂ O ₄；其中x = 0、0.05、0.10、0.15、0.20和0.25）的结构和磁性的影响研究了溶胶-凝胶自燃方法。立方尖晶石结构的形成（空间群Fd3mX射线衍射结合Rietveld结构细化分析和变换红外光谱（FT-IR）分析得到证实。同样，相和元素分析证实，通过添加钒，不可避免地会出现尖晶石相和赤铁矿第二相。因此，在含钒的样品中形成了纳米复合材料。但是，通过SEM观察和Rietveld结构细化分析获得的结果相结合，发现钒的存在会影响合成钴铁氧体的尺寸。VSM测量表明，饱和磁化强度和矫顽力值在很大程度上取决于钒含量和粒径，因此，对于Co _0.85 V ，矫顽力的最大值等于〜916 Oe。_0.15 Fe ₂ O ₄。