Size and shape effects on Curie temperature of ferromagnetic nanoparticles
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.
nanoparticle size effect shape effect ferromagnet Curie temperature
CAO Ling-fei XIE Dan GUO Ming-xing H.S.Park T.Fujita
School of Engineering,University of Tokyo,Bunkyo-ku,Tokyo 113-8656,Japan Laboratory of Crystallography,Department of Materials,ETH-Zürich,CH-8093 Zürich,Switzerland School of Materials Science and Engineering,Central South University,Changsha 410083,China
国际会议
2007年国际有色金属大会(International Conference of Nonfereous Materials 2007)(ICNFM)
长沙
英文
2007-11-28（万方平台首次上网日期，不代表论文的发表时间）