Effect of Cu doping on the structure and phase transition of directly synthesized FePt nanoparticles
Effect of Cu doping on the structure and phase transition of directly synthesized FePt nanoparticles
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Cu掺杂对直接合成FePt纳米颗粒结构和相变的影响
DOI：
10.1016/j.jmmm.2016.09.047
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发表时间：
2017-01-15
影响因子：
2.7
通讯作者：
Ruterana, Pierre
中科院分区：
文献类型：
--
作者：
Wang, Hanbin;Li, Yang;Ruterana, Pierre
在这项工作中，三元铜掺杂FePt纳米粒子制备十六胺在320 ℃下，通过选择FeCl2作为铁源。实验结果表明，未掺杂Cu时，所制备的FePt纳米粒子具有面心立方结构，随着Cu掺杂浓度的增加，其衍射峰逐渐呈现典型的面心立方结构。TEM照片表明，Cu添加剂的加入使FePt纳米粒子的粒径增大，粒径分布变宽。磁性能测试表明，当三元纳米颗粒的组成达到Fe 35Pt45Cu 20时，磁性达到4800 Oe，其中Fe+Cu的含量高于Pt。研究表明，Cu掺杂促进FePt纳米颗粒在低至320 ℃的温度下的相变。
In this work, ternary Cu doped FePt nanoparticles were prepared in hexadecylamine at 320 degrees C by choosing FeCl2 as the Fe source. The experimental results showed that without Cu doping the as-prepared FePt nanoparticles possessed fcc structure and gradually exhibited typical fcl diffraction peaks after increasing the Cu doping concentration. TEM images showed that the FePt nanoparticles had larger size and wider size distribution after introducing Cu additive. Magnetic property measurement showed that a coercivity of 4800 Oe was obtained when the composition of the ternary nanoparticles reached Fe35Pt45Cu20, in which the content of Fe+Cu was higher than Pt. The research indicates that Cu doping promotes the phase transition of FePt nanoparticles at temperature as low as 320 degrees C.