The Zn-Zr co-substituted cobalt ferrite nanoparticles (CoZn_xZr_xFe_2-2xO_4, x = 0.0˗0.4) were synthesized by sol gel auto combustion route. The formation of cubic phase of Co ferrite was revealed from the X-ray diffractograms of the powder samples. The additional α-Fe₂O₃ and ZrO₂ phases were occurred for ≥20% Zn-Zr substitution. The lattice parameters obtained by extrapolating Nelson–Riley function shows increase in its values with the Zn-Zr substitution. The particle size shows increasing trend with the Zn-Zr substitution. The cation distribution obtained from the Rietveld refinement of XRD estimate the equal preference of Zn ons preferred tetrahedral A site whereas most of the Zr ions occupy octahedral B site. The decrease in Fe ions with the Zn-Zr substitution resulted in the decrease in coercivity and saturation magnetization of the ferrites. Zero field cooled and field cooled magnetization plots of the ferrites reveals the ferromagnetic behaviour of the prepared ferrite samples. The blocking temperature does not vary significantly with the varying Zn-Zr substitution. The Mössbauer study confirms the weakening of the magnetic linkages between cations at A and B sites, due to the substitution of non-magnetic Zn-Zr ions for magnetic Fe ions. The decrease in coercivity with moderate saturation magnetization could make this material suitable for electronic devices.

通过溶胶凝胶自动燃烧法合成了Zn-Zr共取代钴铁氧体纳米粒子（CoZn _x Zr _x Fe _2-2x O _4， x =0.0˗0.4）。从粉末样品的X射线衍射图可以看出钴铁氧体的立方相的形成。额外的α-Fe ₂ ö ₃和ZrO ₂发生了≥20％Zn-Zr取代的相。通过外推Nelson-Riley函数获得的晶格参数显示，其值随Zn-Zr取代而增加。随着Zn-Zr的取代，粒径呈现增加趋势。从XRD的Rietveld精修获得的阳离子分布估计Zn在优选的四面体A位点上具有相同的优先级，而大多数Zr离子占据八面体B位点。Zn-Zr置换引起的Fe离子减少导致铁氧体的矫顽力和饱和磁化强度降低。铁氧体的零磁场冷却和磁场冷却的磁化曲线揭示了制备的铁氧体样品的铁磁行为。Zn-Zr取代度的变化不会使封端温度发生明显变化。Mössbauer的研究证实，由于用非磁性的Zn-Zr离子代替了磁性的Fe离子，导致A和B位置上的阳离子之间的磁性键减弱。矫顽力随着中等饱和磁化强度的降低可能使这种材料适用于电子设备。