强磁场辅助合成FePtCu纳米粒子及其有序结构调控  

High Magnetic Field Assisted Synthesis of FePtCu Nanoparticles with Tunable Ordered Structure

作　　者：赵东 吴纯 乔鹏飞 王建军[1] 王强 裴文利[1] Zhao Dong;Wu Chun;Qiao Pengfei;Wang Jianjun;Wang Qiang;Pei Wenli(Key Laboratory for Anisotropy and Texture of Materials,Ministry of Education,Northeastern University,Shenyang 110819,China;School of Materials Science and Engineering,Liaoning Technical University,Fuxin 123000,China;Key Laboratory of Electromagnetic Processing of Materials,Ministry of Education,Northeastern University,Shenyang 110819,China)

机构地区：[1]东北大学材料各向异性与织构教育部重点实验室,辽宁沈阳110819 [2]辽宁工程技术大学材料科学与工程学院,辽宁阜新123000 [3]东北大学材料电磁过程研究教育部重点实验室,辽宁沈阳110819

出　　处：《稀有金属材料与工程》2021年第12期4534-4538,共5页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(51871045,52071070);中央高校基本科研业务费(N2017003);辽宁省博士启动基金(2019-BS-116)。

摘　　要：本研究将强磁场引入到湿化学法中,合成高有序度的FePtCu纳米粒子。研究表明:磁场下制备的FePtCu纳米粒子呈球形,形貌、尺寸均一,分散度较好。随着磁场强度的增加,FePtCu纳米粒子的尺寸增加,有序度(s)和矫顽力逐渐增加。在6 T强磁场下,获得了尺寸约为11.21 nm,s为0.8985的L1;-FePtCu纳米粒子。强磁场对粒子的磁化作用造成晶格应变,导致空位或缺陷形成,从而有效加速Fe和Pt原子的有序化扩散,促进了FePt纳米粒子的无序-有序转化。强磁场辅助可实现对有序结构的调控,该方法为直接制备L1;结构纳米材料提供了一种新思路。High magnetic fields(HMF)can pass high intensity energies to the atomic scale of materials without contact to change the thermodynamic state of materials,and affect the arrangement,matching and migration of atoms and molecules.Therefore,in th is work,HMF was introduced into wet-chemical synthesis to prepare FePtCu nanoparticles(NPs).The results show that the FePtCu NPs with L1;structure,uniform morphology,and good dispersibility were successfully prepared under HMF.With the increase of magnetic field,the size FePtCu NPs increases,and the ordering degree(s)and the coercivity gradually increase.The L1;-FePtCu NPs with sizes of about11.21 nm and ordering degree of 0.8985 are obtained under the HMF of 6 T.The maghrtization of particle by HMF causes lattice distortions and leads to the formation of vacancies or defects in the FePt NPs,which effectively accelerate the orderly diffusion of Fe and Pt atoms and promotes the disordered-ordered transformation of the FePt NPs.Therefore,HMF assistance can accomplish the regulation of ordered structure.This method provides a new path for the direct synthesis of L1;structured nanomaterial’s.

关 键 词：强磁场 湿化学法 FePtCu 纳米粒子 有序结构 

分 类 号：TQ586.1[化学工程—精细化工]