Polycrystalline ferrites Ni_0.5-xCu_0.12Zn_0.4Co_xFe_1.98O_4-δ with different cobalt-substituted contents (x = 0, 0.003, 0.006, 0.009, 0.012, 0.015) are synthetized via the solid-state reaction method. The magnetocrystalline anisotropy constant is calculated based on the law of approach to saturation. As the amount of cobalt substitution increases, the absolute value of the magnetocrystalline anisotropy constant first decreases and then rises due to the positive compensation by the Co²⁺ ions. The value of the magnetocrystalline anisotropy constant tends to be zero for the samples with cobalt substitution contents in the range of 0.003–0.006. Meanwhile, when the cobalt substitution content is 0.003, the NiCuZn ferrite shows minimum ferromagnetic resonance linewidth (9.87 kA/m) and low dielectric loss tangent (tgδ_ε, 1.1 × 10⁻⁴) at 9.4 GHz as well as a high magnetization (M_s, 406 kA/m) and high squareness ratio (B_r/B_s, 0.83). Furthermore, the linewidth contribution is identified by the anisotropy and porosity linewidth broadening model based on the spin-wave approach, and the results show that porosity linewidth broadening is the predominant effect.

 通过固态反应法合成了具有不同钴取代含量（x = _{0、0.003、0.006、0.009、0.012、0.015）的}多晶铁氧体Ni _{0.5- x} Cu _0.12 Zn _0.4 Co _x Fe _1.98 O ₄ - _δ。磁晶各向异性常数是根据接近饱和定律计算的。随着钴取代量的增加，由于Co ²⁺的正补偿，磁晶各向异性常数的绝对值先减小然后增大。离子。对于钴取代含量在0.003至0.006范围内的样品，其磁晶各向异性常数的值趋于为零。同时，当钴取代含量为0.003，所述的NiCuZn铁氧体示出最小铁磁共振行距（9.87千安/米）和低介电损耗角正切（TG δ _ε，1.1×10 ^-4）在9.4千兆赫以及高磁化（M _s，406 kA / m）和高矩形比（B _r / B _s，0.83）。此外，通过基于自旋波方法的各向异性和孔隙度线宽展宽模型，可以确定线宽的贡献，结果表明，孔隙度线宽展宽是主要的影响。