期刊
CHEMICAL PHYSICS
卷 383, 期 1-3, 页码 1-5出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.chemphys.2011.03.010
关键词
Modelling; Curie temperature; Average coordination number; Cohesive energy; Nanoparticle
To study the effect of size and shape of metallic nanoparticle on their Curie temperature, an analytical model is proposed. The core average coordination number (CAC) and surface average coordination number (SAC) of freestanding nanoparticles are considered in the model. Clusters of icosahedral (IC) and body centred cubic (BCC) structure without any vacancies and defects are modelled. A critical Curie temperature is introduced for metallic clusters with a diameter of 2-3 nm. This critical diameter is related to clusters which the ratio of surface atoms to total atoms is about 50%. The `` shape effect'' is shown to be important at sizes less than 20 nm. The obtained results are supported by available experimental results for nickel and iron nanoparticles. (C) 2011 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据