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中文摘要：
构造了FePt：Au有序纳米颗粒膜的微结构模型，利用微磁学模拟的方法研究了一系列不同Au含量的FePt：Au颗粒膜的磁学性质。对比实验数据，分析反磁化过程可知：当反映Au含量的交换作用比例系数β〉0.4时，FePt：Au颗粒膜的矫顽力随卢减小而增大，但增幅较小，磁化反转为一致反转；当β〈0.3时，随β的减小矫顽力迅速增大，磁化反转一致性降低,分析指出,当FePt磁性颗粒之间间距约为3～4nm时，颗粒间的交换相互作用可以近似为零,磁化反转为非一致反转。
英文摘要：
A microstructure model of ordered FePt ： Au nanogranular films was constructed. The magnetization reversal mechanism of FePt：Au granular films with different percentages of non-magnetic Au were investigated by micro-magnetic simulation. The results show that the reversal mechanism significantly depends on the percentage of Au. As the interaction coefficient of proportionalityβ, which reflects the percentage of Au, is greater than 0.4, the reversal model is coherent and the coercive force increases slightly with reducing ft. But forβ〈 0.3, the coercive force increases quickly with reducing fl, and the consistency of magnetization reversal is weakened. It is estimated that as the space length between the FePt granulars varies from 3 nm to 4 nm, the interaction of granular exchange is near to zero and the magnetization reversal is incoherent.
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