Soft magnetic phase cobalt ferrite (CoFe₂O₄) and hard magnetic phase strontium ferrite (SrFe₁₂O₁₉) were synthesized by co-precipitation route. Nanocomposite S:H-1:2 was prepared comprising soft (S) and hard (H) phases in the weight ratio of 1:2, higher ratio corresponding to SrFe₁₂O₁₉. The average crystallite size of CoFe₂O₄ and SrFe₁₂O₁₉ as obtained from refinement data was 19 nm and 50 nm respectively. Lattice strain evaluated using the Williamson-Hall plot was observed as 0.53%, 0.17%, and 0.61% for CoFe₂O₄, SrFe₁₂O₁₉, and S:H-1:2. Room temperature magnetic measurements were performed revealing the presence of exchange interaction present in the prepared composite. First-order reversal curve (FORC) measurements were performed for further confirming the exchange behavior of S:H-1:2. The maximum energy product obtained for S:H-1:2 was 0.067 MGOe which is greater than CoFe₂O₄ and SrFe₁₂O₁₉. Low dielectric loss was observed from impedance measurements. Presence of exchange coupling and low dielectric loss makes S:H-1:2 a potential candidate for microwave absorption.

通过共沉淀法合成了软磁相钴铁氧体（CoFe ₂ O ₄）和硬磁相锶铁氧体（SrFe ₁₂ O ₁₉）。制备包含软相（S）和硬相（H）的纳米复合材料S：H-1：2，其重量比为1：2，较高的比例对应于SrFe ₁₂ O ₁₉。由细化数据获得的CoFe ₂ O ₄和SrFe ₁₂ O ₁₉的平均微晶尺寸分别为19nm和50nm。对于CoFe ₂ O ₄，SrFe，使用Williamson-Hall曲线评估的晶格应变观察为0.53％，0.17％和0.61％₁₂ O ₁₉和S：H-1：2。进行了室温磁性测量，揭示了在制备的复合物中存在交换相互作用。进行了一阶反转曲线（FORC）测量以进一步确认S：H-1：2的交换行为。S：H-1：2的最大能量积为0.067 MGOe，大于CoFe ₂ O ₄和SrFe ₁₂ O ₁₉。从阻抗测量中观察到低的介电损耗。交换耦合的存在和低介电损耗使S：H-1：2成为微波吸收的潜在候选者。