FePt纳米颗粒的制备与表征  

Preparation and characterization of FePt nanoparticles

作　　者：李芳[1] 杜雪岩[1,2] 陈尹泽[1] 马应霞[1,2] 杨瑞成[1,2] 

机构地区：[1]兰州理工大学甘肃省有色金属新材料重点实验室,甘肃兰州730050 [2]兰州理工大学有色金属合金及加工教育部重点实验室,甘肃兰州730050

出　　处：《兰州理工大学学报》2009年第1期25-27,共3页Journal of Lanzhou University of Technology

基　　金：甘肃省中青年科技基金(3YS061-A25-025)

摘　　要：通过化学还原法制备FePt纳米颗粒,研究热处理前后其磁性能的变化.XRD及TEM分析表明,所制备的FePt纳米颗粒为fcc结构,颗粒为类球形且分散性较好,尺寸约为5.0 nm,热处理使FePt纳米颗粒从无序的fcc相变成有序的fct结构.VSM显示所制备FePt纳米颗粒的矫顽力为零,呈现超顺磁性,500℃高温退火处理后矫顽力可达1/(2π)×106A/m.FePt nanoparticles were prepared by using chemical reduction method. The effect of annealing treatment on the magnetic properties of FePt was investigated. The results of XRD and TEM confirmed that the as-synthesized FePt nanoparticles were of fcc structure and changed into fct structure after annealing at 500℃ for 30min, and most of the particles were mono-dispersion with a size of around 5.0 nm and spherical in shape. VSM investigation indicated that the as-synthesized FePt nanoparticles were superparamagnetic while the annealing treatment at 500℃ for 30min made its coercivity as high as 1/（2π）× 10^6 A/m.

关 键 词：FEPT纳米颗粒 制备 热处理 

分 类 号：TB383[一般工业技术—材料科学与工程]