Tuning structure and magnetic properties of table-like magnetocaloric effect in Er_(6)MnSb_(2) by zirconium substitution  

作　　者：Tonghan Yang Jiliang Zhang Wei He Kaimin Shih Shengshou Ma Cuiyun He 

机构地区：[1]College of Chemistry and Chemical Engineering,Key Laboratory of New Processing Technology for Nonferrous Metal and Materials(Ministry of Education),Guangxi Key Laboratory of Processing for Non-ferrous Metallic and Featured Materials,School of Resources,Environment and Materials,Guangxi University,Nanning 530004,China [2]School of Materials Science and Engineering,Dalian Jiaotong University,Dalian 116028,China [3]Department of Materials Science and Engineering,Korea University,Seoul,02841,South Korea [4]Department of Civil Engineering,The University of Hong Kong,Hong Kong SAR,China

出　　处：《Journal of Rare Earths》2023年第7期1073-1082,I0004,共11页稀土学报（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (51861003);the Research Grants Council of Hong Kong(17208120)。

摘　　要：In this study,zirconium(Zr) successfully substituted for erbium(Er) in Er_(6-x)Zr_(x)MnSb_(2)(x=0,0.5,1,1.5) of the Fe_(2)P type,with comprehensive characterizations on crystal structure,electronic structure and magnetic properties.According to synchrotron powder X-ray diffraction data analysis and density functional theory calculation,Zr does not randomly but preferentially occupy during the doping process and results in weaker magnetic exchange interactions and depressed ordering temperatures.The electronic structure data show that the doping of Zr can weaken interaction between Er and Mn atoms.Owing to multiple transitions,the Er_(6-x)Zr_(x)MnSb_(2)(x=0,0.5,1,1.5) exhibit table-like magnetocaloric effect.Er_(6)MnSb_(2) displays wide δT_(FWHM)(full width at half maximum of the magnetic entropy change curve) of 116 K and high relative cooling power of 388.62 J/kg for 3 T.The maximum magnetic entropy change of Er_(6-x)Zr_(x)MnSb_(2) is increased from 3.81 to 7.69 J/(kg·K) with the Zr content up from x=0 to x=1.5.

关 键 词：Er_(6-x)Zr_(x)MnSb_(2) Preferential occupancy Magnetic exchange Table-like magnetocaloric effect Rare earths 

分 类 号：TB64[一般工业技术—制冷工程]