Size and shape effects on Curie temperature of ferromagnetic nanoparticles
Size and shape effects on Curie temperature of ferromagnetic nanoparticles
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DOI：
10.1016/s1003-6326(07)60293-3
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发表时间：
2007-12-01
影响因子：
4.5
通讯作者：
Fujita, T.
中科院分区：
文献类型：
--
作者：
Cao Ling-fei;Xie Dan;Fujita, T.
开发了一个简化模型来描述铁磁纳米颗粒的居里温度抑制。基于内聚能的尺寸和形状相关模型，推导出铁磁纳米颗粒的临界温度变化。据预测，纳米颗粒的居里温度取决于尺寸和形状条件，其中温度抑制受颗粒尺寸影响较大，形状影响相对较小。独立纳米颗粒的计算值与其他理论模型和实验结果非常吻合。该模型还可以用于预测嵌入不同基质中的纳米颗粒。
A simplified model was developed to describe the Curie temperature suppression of ferromagnetic nanoparticles. Based on a size and shape dependent model of cohesive energy, the critical temperature variations of ferromagnetic nanoparticles were deduced. It is predicted that the Curie temperature of nanoparticles depends on both size and shape conditions, among which the temperature suppression is strongly influenced by the particle size and the shape effect is comparably minor. The calculation values for freestanding nanoparticles are in good agreement with other theoretical model and the experimental results. The model is also potential for predictions for the nanoparticles embedded in different substrates.