Direct Chemical Synthesis of L10-FePtAu Nanoparticles with High Coercivity

• 作 者: YongshengYu;WeiweiYang;
• 机 构: School of Chemical Engineering and Technology,Harbin Institute of Technology,Harbin,Heilongjiang 150
• 出 处: The 6th International Conference on Nanoscience and Technolo
• 发表日期: 2015年期

　　Here,we report a new method to directly prepare L10-FePtAu nanoparticles(NPs)from solution synthesis.The unique feature of this synthesis is that oleylamine(OAm)in the synthesis serves as surfactant,solvent and reducing agent at the same time and no other strong reducing agent was used in the synthesis.By simply heating the solution of Fe(acac)3,Pt(acac)2 and gold acetate with OAm to 350 ℃,L10-FePtAu NPs could be directly obtained without further annealing.NP sizes were controlled to be 5.5 to 11.0 nm by changing the amount of Au doping.The highest coervicity of 12.15 kOe at room temperature could be achieved for the NPs with 32%Au doping,which is much higher than the coercivities reported by the previous studies on solution-synthesized FePt NPs.