Large magnetocaloric effect and magnetoresistance in ErNi single crystal  

作　　者：Xuanwei Zhao Xianming Zheng Xiaohua Luo Fei Gaod Hai Zeng Guang Yu Sajjad Ur Rehman Changcai Chen Shengcan Ma Weijun Ren Zhenchen Zhong 

机构地区：[1]Jiangxi Key Laboratory for Rare Earth Magnetic Materials and Devices,College of Rare earths,Jiangxi University of Science and Technology,Ganzhou 341000,People’s Republic of China [2]Ganzhou Key Laboratory for Rare Earth Magnetic Functional Materials and Physics,College of Rare earths,Jiangxi University of Science and Technology,Ganzhou 341000,People’s Republic of China [3]School of Materials Science and Engineering,Faculty of Materials Metallurgy and Chemistry,Jiangxi University of Science and Technology,Ganzhou 341000,People’s Republic of China [4]Shenyang National Laboratory for Materials Science,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,People’s Republic of China [5]Key Laboratory of Electromagnetic Processing of Materials,Northeastern University,Shenyang,110819,People’s Republic of China

出　　处：《Journal of Materials Science & Technology》2021年第27期56-63,共8页材料科学技术（英文版）

基　　金：financially supported by the Natural Science Foundation of Jiangxi Province(No.20202BAB214002);the Jiangxi Provincial Education Department’s Research Project of Science and Technology(No.GJJ190484);the Scientific Research Start-up Foundation of Jiangxi University of Science and Technology(Grant No.3401223366);the National Natural Science Foundation of China(Nos.52061014,51671097 and 52071323);Ganzhou Science and Technology Innovation Talent Plan(No.3208000033);the Key Project of Natural Science Foundation of Jiangxi Province(No.20192ACB20004);the Graduate Student Innovation Special Funds Project of Jiangxi Province(No.YC2019-S303)。

摘　　要：The magnetic properties,magnetocaloric effect and magnetoresistance in Er Ni single crystal have been investigated in detail.With decreasing temperature,Er Ni single crystal undergoes two successive magnetic transitions:a paramagnetic to ferromagnetic transition at T_(C)=11 K and a spin-reorientation transition at TS_(R)=5 K.Meanwhile,a sharp field-induced metamagnetic transition is observed below the T_(C)along the a axis.Er Ni single crystal possesses a giant magnetocaloric effect around T_(C).The maximum magnetic entropy change is-36.1 J(kg K)^(-1)along the a axis under the field change of 0-50 k Oe.In particular,the rotating magnetocaloric effect in Er Ni single crystal reaches its maximum under a relatively low field,and the maximum rotating entropy change with a value of 9.3 J(kg K)^(-1)is obtained by rotating the applied field from the[011]to[100]directions under 13 k Oe.These results suggest that Er Ni could be a promising candidate for magnetic refrigeration working at liquid-helium temperature region.Moreover,a complicated transport behavior is uncovered in Er Ni single crystal,which is attributed to the complex magnetic states and magnetic polaronic effect.Both positive and negative magnetoresistance are observed.A considerable large magnetoresistance with the value of-34.5%is acquired at 8 K under50 k Oe when the field is along the[100]direction.

关 键 词：Rare-earth transition-metal intermetallics Magnetic refrigeration Magnetocaloric effect Magnetocrystalline anisotropy MAGNETORESISTANCE 

分 类 号：TB34[一般工业技术—材料科学与工程]