Abstract:
Zn2+ doped Z-type hexaferrites Sr3Co2-xZnxFe24O41 (x = 0 - 1.6) were prepared with the conventional solid state reaction method. The magnetic properties of Sr3Co2-xZnxFe24O41 with different Zn2+ content at different temperatures were investigated. Results show that the particles of powder samples with different Zn2+ content are layered growth and have a similar hexagonal shape. Samples with different Zn2+ content at different temperatures show soft magnetic properties. The saturation magnetization increases firstly and then decreases with the increase in Zn2+ content. The maximum saturation magnetization is obtained at x = 1.2. The variation of saturation magnetization with composition at different temperatures is similar. The coercive fields vary with composition. However, no distinct variation trend is observed. The samples have the relative low coercive fields when x is 0 and 1.2. When x < 1.2, the coercive field decreases when the temperature is increased. When x > 1.2, the influence of temperature on the coercive fields is negligible. The above results show that, when the value of x is 1.2, the Zn2+ doped Z-type hexaferrite has both the largest saturation magnetization and the relatively small coercive field, and as a result, the best soft magnetic property.