【作者】 汪汉斌； 李扬； 舒丹； 刘向； 王浩；

【Author】 Wang hanbin;Li yang;Shu dan;Liu xiang;Wang hao;Faculty of Physics and Electronic Technology,Hubei University;Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials;

【机构】 湖北大学物理与电子科学学院； 有机化工新材料湖北省协同创新中心；

【摘要】 本文在不同高沸点有机溶剂中制备出Cu掺杂的的FePt纳米颗粒。实验研究表明:在未掺杂Cu元素时,FePt颗粒为fcc结构。在FeCl₂作为Fe源的条件下,随着Cu元素掺杂量的增加,样品逐渐显示出fct结构的衍射峰且未出现单质铜的特征峰,表明此时Cu原子进入FePt晶格中,Cu与FePt固溶在一起存在。透射电子显微镜显示Cu掺杂导致制备的纳米颗粒有所长大,颗粒的粒径分布变宽。磁性测量结果表明当反应前驱体中各元素摩尔量之比为Fe:Pt:Cu=1:1:0.6时,制备的纳米颗粒的矫顽力达到了3200 Oe。研究表明Cu掺杂对于FePt颗粒在低温下的相变具有促进作用。更多还原

【Abstract】 In this paper,Cu doped FePt nanoparticles(NPs) were prepared in different organic solvents with high boiling point.The experimental results showed that without Cu doping the as-prepared FePt NPs possessed fcc structure and gradually exhibited typical fct diffraction peaks after increasing the Cu doping concentration.No metallic Cu phase was observed indicating that the Cu atoms were entering the lattice of FePt and alloying with FePt.TEM images showed that the FePt NPs had bigger size and wider size distribution after introducing Cu additive.Magnetic properties measurement showed that a coercivity of 3200 Oe was obtained when the molar ratio of elements in the precursors reached Fe:Pt:Cu=1:1:0.6.The research indicated that Cu doping could promote the phase transition of FePt particles in low temperature.更多还原