The phase transitions of two nanoparticles and their corresponding bulk systems are examined by the effective-field theory with correlations. It is clarified that the transition temperatures of such small nanoparticles may become larger than those of its corresponding bulk systems, when the surface exchange interaction is selected as a large value.

中文翻译：

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上磁有序（T的可能性_Ç通过在伊辛纳米颗粒以T的表面交换相互作用诱导的（N））_Ç（N）>Ť _Ç（B），其中T _Ç（B）是在相应的块状的转变温度系统

通过有效场理论和相关性检验了两个纳米颗粒及其相应的本体系统的相变。明确的是，当将表面交换相互作用选择为大值时，此类小纳米粒子的转变温度可能变得大于其相应的本体系统的转变温度。