Structure,magnetism and magnetic thermal properties of heavy rare earth Tb1-xTmxFeO3(x=0.00,0.15,0.25) polycrystalline samples  

作　　者：Xiang Jin Jianjun Zhao Hongwei Chen Fengze Cao Li Cheng Taichao Su Wenxing Wang Jia Liu Yi Lu 

机构地区：[1] Physics Institute of Science and Technology,Baotou Teachers College,Baotou 014030,China [2] Key Laboratory for Magnetism and Magnetic Material of Inner Mongolia,Baotou Teachers College,Baotou 014030,China [3] Institute of Materials Science and Engineering,Henan Polytechnic University,Jiaozuo 454000,China [4] Management Department of Scientific Research Institute,Inner Mongolia First Machinery Group Co.,Ltd.,Baotou 014032,China

出　　处：《Journal of Rare Earths》2020年第6期600-605,共6页稀土学报（英文版）

基　　金：the National Natural Science Foundation of China(11164019,51562032,61565013);Inner Mongolia Natural Science Foundation of China(2015MS0101,2015MS0109);Inner Mongolia Institute of Science and Technology Key Project Fund(NJZZ11166,NJZY16237,NJZY12202);Board Project(201522011);Natural Science Foundation of Henan Province(182300410248)。

摘　　要：Tb1-xTmxFeO3(x = 0.00,0.15,0.25) polycrystalline series were synthesized using a solid-state reaction.Our results show that all three prepared samples are in a distorted orthogonal structure and their space group is pbnm.When the Tm3+doping amount increases,the characteristics of the spin-flip of the sample decreases following an initial increase at the beginning;the antiferromagnetic property almost reaches zero;the magnetization decreases at the beginning but increases later on.The maximum magnetic entropy change and magnetic refrigeration effect RCP are reduced at varying degrees.Under a 7 T magnetic field,the maximum magnetic entropy change,△Smax,for the three samples of Tb1-xTmxFeO3 with x=0.00,0.15,0.25 is 13.78,-9.28,and 10.69 J/(K·kg),respectively;the magnetic refrigeration capacity(RCP) is 316.85,175.2,and 297.60 J/kg,respectively.In summary,doping with the element Tm reduces △Smax and RCP of the sample.Since the maximum magnetic entropy change and the cooling capacity for the three samples are relatively large,they can be used as an alternative for magnetic refrigerants.

关 键 词：SPIN-FLIP Magnetic entropy change Magnetic refrigeration capacity MAGNETISM Rare earths 

分 类 号：TB64[一般工业技术—制冷工程] TQ133.3[化学工程—无机化工]