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首页> 外文期刊>Physica, B. Condensed Matter >Synthesis and magnetic properties of ferrites spinels Mg_xCu _(1-x)Fe_2O_4
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Synthesis and magnetic properties of ferrites spinels Mg_xCu _(1-x)Fe_2O_4

机译：铁氧体尖晶石Mg_xCu _（1-x）Fe_2O_4的合成及磁性

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摘要

Polycrystalline Mg_(0.6)Cu_(0.4)Fe_2O_4 ferrites have been prepared using solid-state reaction technique. Their structural and magnetic properties have been studied, using X-ray diffraction and magnetic measurements. Using mean field theory and high-temperature series expansions (HTSE), extrapolated with the padé approximants method, the magnetic properties of Mg_(1-x)Cu_xFe_2O_4 have been studied. The nearest neighbor super-exchange interactions for intra-site and inter-site of the Mg_(1-x)Cu_xFe _2O_4 ferrites spinels, in the range 0≤x≤1, have been computed using the probability approach, based on M?ssbauer data. The Curie temperature T_c is calculated as a function of Mg concentration. The obtained theoretical results are in good agreement with experimental ones obtained by magnetic measurements.
机译：利用固态反应技术制备了多晶的Mg_（0.6）Cu_（0.4）Fe_2O_4铁氧体。使用X射线衍射和磁性测量技术研究了它们的结构和磁性。利用平均场理论和高温序列扩展（HTSE），通过padé逼近法外推，研究了Mg_（1-x）Cu_xFe_2O_4的磁性。基于M？ssbauer，使用概率方法计算了Mg_（1-x）Cu_xFe _2O_4铁氧体尖晶石内部和内部的最近邻超级交换相互作用，范围为0≤x≤1数据。计算出居里温度T_c作为Mg浓度的函数。所获得的理论结果与通过磁测量获得的实验结果非常吻合。

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