本研究採用化學析出法與異質凝團法，將0、0.1、0.2、0.3以及0.4 wt% 微量的四氧化三鈷摻雜於鎳銅鋅鐵氧磁體，並且探討其對於顯微結構與電磁性質之影響。隨著四氧化三鈷含量增加，飽和磁化與居禮溫度提高；然而初導磁率下降。利用數值擬合分析磁壁移動與自旋旋轉對於導磁率之貢獻，發現添加四氧化三鈷減少磁壁移動的磁化率，造成導磁率下降。更進一步經由理論計算，得知四氧化三鈷增加磁壁能量，使其變得較不容易移動。摻雜四氧化三鈷也改變電阻率與品質因子，其中，添加0.2 wt% 四氧化三鈷具有最大的電阻率與最佳的品質因子，此乃因為電阻率的增加可以有效減少渦電流損耗，進而提升品質因子。

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