Mn掺杂对Fe2Gd晶体结构和磁相关性能的影响  

Effects of Mn doping on crystal structure and magnetic correlation properties of Fe2Gd compound

作　　者：秦家庆 莫陈鹏 马垒[1,2] 韩成习 苏光兰 董培林 QIN Jiaqing;MO Chenpeng;MA Lei;HAN Chengxi;SU Guanglan;DONG Peilin(School of Material Science and Engineering,Guilin University of Electronic Technology,Guilin 541004,China;Guangxi Key Laboratory of Information Materials,Guilin University of Electronic Technology,Guilin 541004,China)

机构地区：[1]桂林电子科技大学材料科学与工程学院,广西桂林541004 [2]桂林电子科技大学广西信息材料重点实验室,广西桂林541004

出　　处：《桂林电子科技大学学报》2020年第2期169-172,共4页Journal of Guilin University of Electronic Technology

基　　金：国家自然科学基金(51461012);广西高校大学生创新创业训练计划(201810595198)。

摘　　要：为了探索Mn掺杂对Fe2Gd晶体结构及磁相关性能的影响,以铁磁性Fe2Gd为母相,掺入反铁磁性Mn元素替代部分Fe元素,通过氩弧熔炼法制得(Fe1-xMnx)2Gd(x=0,0.1,0.15,0.2,0.3,0.4,0.5)系列合金,在650℃下保温90 h后淬火。利用X射线衍射仪(XRD)和Rietveld全谱拟合精修方法分析该合金的结构,利用振动样品磁强计(VSM)和电阻应变片法分析Mn含量对Fe2Gd合金磁性能和磁致伸缩性能的影响。研究结果表明,(Fe1-xMnx)2Gd系列合金保持了Fe2Gd的MgCu2型立方结构,空间群为Fd-3m,点阵常数和晶胞体积随着Mn含量的增加而增大。该系列合金为软磁材料,在室温和2 T磁场下磁矩接近饱和,最大比磁化强度约为71 A·m2/kg,最大磁致伸缩系数约为5.5×10-5,并随着Mn含量的增加磁矩和磁致伸缩系数逐渐下降。To explore the effect of Mn doping on the crystal structure and magnetic correlation properties of Fe2Gd.Ferromagnetic Fe2Gd was used as parent phase, in which mixed with antiferromagnetic Mn element, was used to replace part of Fe element. A series of(Fe1-xMnx)2Gd(x=0, 0.1, 0.15, 0.2, 0.3, 0.4, 0.5) alloys were prepared by argon arc melting process, quenched after 90 h insulation at 650 ℃. The structure of the alloys were analyzed by X ray diffractometer(XRD) and Rietveld full spectrum fitting refinement method, and the effect of Mn substitution on the magnetic and magnetostrictive properties of Fe2Gd alloy was studied by vibration sample magnetometer(VSM) and resistance strain gauge method. The results showed that(Fe1-xMnx)2Gd series alloys maintain the MgCu2-type cubic structure of Fe2Gd, the space group was Fd-3 m, and the lattice constant and cell volume increased with the increase of Mn substitution. The series of alloys were soft magnetic materials, and the magnetic moment was closed to saturation at room temperature and 2 T magnetic field, the maximum specific magnetization value was about 71 A·m2/kg, and the maximum magnetostrictive coefficient was about 5.5×10-5, and the magnetic moment and magnetostrictive coefficient gradually decreased with the increase of Mn substitution.

关 键 词：Fe2Gd合金 MN掺杂 晶体结构 比磁化强度 磁致伸缩 

分 类 号：TG115.22[金属学及工艺—物理冶金]