Zn²⁺掺杂Sr₃Co₂Fe₂₄O₄₁六角铁氧体的磁性质研究

The Effect of Zn²⁺ Substitution on Magnetic Properties of Z-Type Hexaferrite Sr₃Co₂Fe₂₄O₄₁

摘要:

本文采用固相反应法制备了Z型六角铁氧体Sr₃Co_2-xZn_xFe₂₄O₄₁(x = 0~1.6)材料，研究了不同Zn²⁺含量和不同温度下Sr₃Co_2-xZn_xFe₂₄O₄₁的磁学性能。结果表明，不同Zn²⁺掺杂量的粉末样品颗粒都是层状生长，样品颗粒为类六角形状。不同Zn²⁺掺杂量的样品在不同温度时，都具有明显的软磁特征。随着Zn²⁺掺杂量x值的增加，样品的饱和磁化强度总体有先增大再减小的趋势，x = 1.2时，饱和磁化强度达到最大。在不同温度下，饱和磁化强度随组分变化有相似的变化规律。样品的矫顽力随组分变化而变化，但是没有明显的变化规律。当x = 0和1.2时，样品具有相对较低的矫顽力。当x < 1.2时，升高温度导致矫顽力降低。当x > 1.2时，温度对样品的矫顽力的影响变的很小。综上所述，当x值为1.2时，Sr₃Co_2-xZn_xFe₂₄O₄₁的饱和磁化强度最大，矫顽力相对最小，软磁性能最好。

Abstract:

Zn²⁺ doped Z-type hexaferrites Sr₃Co_2-xZn_xFe₂₄O₄₁ (x = 0 - 1.6) were prepared with the conventional solid state reaction method. The magnetic properties of Sr₃Co_2-xZn_xFe₂₄O₄₁ 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.

文章引用：姜晨, 汤如俊, 杨浩. Zn²⁺掺杂Sr₃Co₂Fe₂₄O₄₁六角铁氧体的磁性质研究 [J]. 应用物理, 2014, 4(3): 17-23. https://dx.doi.org/10.12677/APP.2014.43003

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