Mossbauer Spectroscopy, Structural and Magnetic Studies of Zn2+ Substituted Magnesium Ferrite Nanomaterials Prepared by Sol-Gel Method
Mossbauer Spectroscopy, Structural and Magnetic Studies of Zn2+ Substituted Magnesium Ferrite Nanomaterials Prepared by Sol-Gel Method
复制标题
溶胶-凝胶法制备Zn2取代镁铁氧体纳米材料的穆斯堡尔谱、结构和磁学研究
DOI：
10.1155/2015/854840
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发表时间：
2015-01-01
影响因子：
--
通讯作者：
Dong, Jianghui
中科院分区：
文献类型：
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作者：
He, Yun;Yang, Xingxing;Dong, Jianghui
采用溶胶-凝胶自燃烧法制备了Zn取代的Mg 1-xZnxFe 2 O 4（x = 0，0.1，0.3，0.5，0.7）纳米粉体。晶格常数随Zn含量的增加而增加，但平均晶粒尺寸趋于减小。SEM结果显示了样品的晶粒分布和形貌。一些颗粒由于颗粒之间存在磁相互作用而聚集。Mg_（1-x）Zn_xFe_2 O_4的室温穆斯堡尔谱表明，随着Zn含量的增加，A穆斯堡尔吸收面积减小，B穆斯堡尔吸收面积增大。饱和磁化强度的变化可以用尼尔理论来解释。据证实，从亚铁磁性的超顺磁性行为的转变取决于在室温下的穆斯堡尔谱的锌浓度的增加。随着Zn含量的增加，饱和磁化强度增加，矫顽力降低。
Zinc substituted magnesium ferrite nanomaterials Mg1-xZnxFe2O4 (x = 0, 0.1, 0.3, 0.5, 0.7) powders have been prepared by a solgel autocombustion method. The lattice parameter increases with increase in Zn concentration, but average crystallite size tends to decrease by increasing the zinc content. SEM results indicate the distribution of grains and morphology of the samples. Some particles are agglomerated due to the presence of magnetic interactions among particles. Room temperature Mossbauer spectra of Mg1-xZnxFe2O4 shows that the A Mossbauer absorption area decreases and the B Mossbauer absorption area increases with zinc concentration increasing. The change of the saturation magnetization can be explained with Neel's theory. It was confirmed that the transition from ferrimagnetic to superparamagnetic behaviour depends on increase in zinc concentration by Mossbauer spectra at room temperature. Saturation magnetization increases and coercivity decreases with Zn content increasing.