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

作　　者：姜晨[1] 汤如俊[1] 杨浩[1] 

机构地区：[1]苏州大学物理、光电与能源学部,苏州

出　　处：《应用物理》2014年第3期17-23,共7页Applied Physics

基　　金：国家自然科学基金(51202153,11004145,11274237,51228201)的支持;教育部基金(20123201120028).

摘　　要：本文采用固相反应法制备了Z型六角铁氧体Sr3Co2-xZnxFe24O41(x = 0~1.6)材料,研究了不同Zn2+含量和不同温度下Sr3Co2-xZnxFe24O41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 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,Sr3Co2-xZnxFe24O41的饱和磁化强度最大,矫顽力相对最小,软磁性能最好。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 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.

关 键 词：Z型六角铁氧体 Zn2+掺杂 温度 磁性质 

分 类 号：O64[理学—物理化学]