磁场退火诱导下组装的FePt纳米粒子体系(英文)  

The assembled FePt nanoparticles assemblies induced by the magnetic field annealing

作　　者：桂霞[1] 于欣欣[1] 戴鹏[1] 吴明在[1] 王磊[1] 刘先松[1] 孙兆奇[1] 郑秀文[2] 

机构地区：[1]安徽大学物理与材料科学学院,安徽省磁性材料工程技术研究中心,安徽合肥230039 [2]临沂大学化学化工学院,山东临沂276000

出　　处：《安徽大学学报（自然科学版）》2013年第5期45-50,共6页Journal of Anhui University(Natural Science Edition)

基　　金：Supported by the"211 Project"of Anhui University;National Natural Science Foundation of China(50901074,51272001,21101087);Anhui Provincial Natural Science Foundation(11040606M49);Higher Educational Natural Science Foundation of Anhui Province(KJ2012A007)

摘　　要：为解决FePt纳米粒子在磁记录应用中面临的三个问题:高的转变温度、强的磁耦合和垂直取向,提出一个统一的解决方案.包覆聚乙烯吡咯烷酮(PVP)分子的FePt纳米颗粒体系在磁场诱导下被组装.磁退火后,得到具有较低转变温度和垂直取向的FePt纳米颗粒组装体系.碳化的壳层不仅抑制了粒子的生长,还降低了相邻粒子之间的交换耦合.With the aim at three problems of the FePt nanoparticles in magnetic recording application ： high transition temperature, strong magnetic cot/piing, and perpendicular orientation, a unified solution was reported. Under the induction of magnetic field, FePt nanoparticles assemblies coated with polyvinylpyrrolidone （PVP） molecules were assembled. After magnetic annealing, FePt nanoparticles assemblies with reduced transition temperature and induced perpendicular orientation was obtained. The carbon shells not only inhibited the growth of the particles, but also reduced the exchange coupling between the neighboring particles.

关 键 词：FEPT 退火 磁场 

分 类 号：TB383[一般工业技术—材料科学与工程]