Structural transformation and magnetic properties of Sm-Fe alloys with V doping  

作　　者：Yong-Jun Mao Jin-Ling Jin Jia-Jun Xie Yang Luo Kuo-She Li Wen-Long Yan Dun-Bo Yu Hong-Wei Li 

机构地区：[1]National Engineering Research Center for Rare Earth Materials,General Research Institute for Nonferrous Metals,Beijing 100088,China [2]Grirem Advanced Materials Co.Ltd.,Beijing 100088,China

出　　处：《Rare Metals》2022年第7期2349-2352,共4页稀有金属（英文版）

基　　金：financially supported by the National High Technology Research and Development Program of China (No. 2011AA03A402)

摘　　要：A systematical investigation was carried out on structure and magnetic properties in SmFe_(9-x)V_(x)(x=0.4,0.8,1.2)compounds prepared by a single-roller quenching method.The high cool-down rate leads to metastable TbCu_(7) phase in the parent compound,which gradually transforms into equilibrium ThMn_(12) structure with V-doping content increasing.The Curie temperature increases from 470 to 590 K with V doping,which is consistent with the phase transformation.Surprisingly,simultaneous increase in both coercivity and remanence is resulted by V doping,reaching the highest value of 685 kA·m^(-1)and 44.8×10^(-3)A·m^(2)·g^(-1)in x=1.2 compound,respectively.This phenomenon can be explained by the combination of phase transformation and intergranular exchange coupling throughδM-H plots.

关 键 词：Phase transformation Magnetic properties Exchange coupling Element doping ThMn12-type phase 

分 类 号：TG146.45[一般工业技术—材料科学与工程] TG156.3[金属学及工艺—金属材料]