Size and shape effects on Curie temperature of ferromagnetic nanoparticles

来源期刊：中国有色金属学报(英文版)2007年第6期

论文作者：曹玲飞 谢丹 郭明星 H.S. Park T. Fujita

文章页码：1451 - 1455

Key words：nanoparticle; size effect; shape effect; ferromagnet; Curie temperature

Abstract: 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.

基金信息：the JSPS Postdoctoral Fellowship For Foreign Researches