Perpendicularly Self-Oriented and Shape-Controlled L10-FePt Nanorods Directly Synthesized by a Temperature-Modulated Process  

作　　者：Tiago Luis da Silva Laudemir Carlos Varanda 

机构地区：[1]Colloidal Materials Group, Instituto de Quimica de Sao Carlos, Universidade de Sao Paulo--USP, Sao Carlos, PO Box 780, 13566-590, Brazil

出　　处：《Nano Research》2011年第7期666-674,共9页纳米研究（英文版）

摘　　要：The synthesis and self-assembly of tetragonal phase-containing L10-Fe55Pt45 nanorods with high coercive field is described. The experimental procedure resulted in a tetragonal/cubic phase ratio close to 1：1 for the as-synthesized nanoparticles. Using different surfactant/solvent proportions in the process allowed control of particle morphology from nanospheres to nanowires. Monodisperse nanorods with lengths of 60 ＋ 5 nm and diameters of 2-3 nm were self-assembled in a perpendicular oriented array onto a substrate surface using hexadecylamine as organic spacer. Magnetic alignment and properties assigned, respectively, to the shape anisotropy and the tetragonal phase suggest that the self-assembled materials are a strong candidate to solve the problem of random magnetic alignment observed in FePt nanospheres leading to applications in ultrahigh magnetic recording （UHMR） systems capable of achieving a performance of the order of terabits/in2.合成并且有高强制的地的四角形的包含阶段的 L10-Fe55Pt45 nanorods 自己组装被描述。试验性的过程为同样综合的 nanoparticles 导致了四角形 / 立方的阶段比率结束到 1:1。在这进程使用不同表面活化剂 / 溶剂比例从 nanospheres 允许粒子形态学的控制到 nanowires。有一些 60 的 Monodisperse

关 键 词：Magnetic materials data storage FePt nanorods self-assembl~ perpendicular magnetic alignment 

分 类 号：TQ225.52[化学工程—有机化工] TP391.72[自动化与计算机技术—计算机应用技术]