Large reversible magnetocaloric effect in antiferromagnetic Er_(3)Si_(2)C_(2) compound  

作　　者：Hao Sun Lu Tian Xinqiang Gao Zhaojun Mo Jun Shen Baogen Shen 

机构地区：[1]School of Rare Earths,University of Science and Technology of China,Hefei,230026,China [2]Ganjiang Innovation Academy,Chinese Academy of Sciences,Ganzhou,341000,China [3]Department of Energy and Power Engineering,School of Mechanical Engineering,Beijing Institute of Technology,Beijing,100081,China

出　　处：《Journal of Rare Earths》2024年第8期1555-1559,I0005,共6页稀土学报（英文版）

基　　金：supported by the National Key Research and Development Program of China (2021YFB3501204);the National Science Foundation for Excellent Young Scholars (52222107);the National Science Foundation for Distinguished Young Scholars (51925605);the National Natural Science Foundation of China (52171195);Projects of Ganjiang Innovation Academy,Chinese Academy of Sciences (E055B002)。

摘　　要：The magnetic properties,magnetic phase transition and magnetocaloric effects(MCE) of Er_(3)Si_(2)C_(2) compound were investigated based on theoretical calculations and experimental analysis.Based on the first principles calculations,the antiferromagnetic(AFM) ground state type in Er_(3)Si_(2)C_(2) compound was predicted and its electronic structure was investigated.The experimental results show that Ei_(3)Si_(2)C_(2) compound is an AFM compound with the Neel temperature(T_(N) of 7 K and undergoes a field-induced firstorder magnetic phase transition from AFM to ferromagnetic(FM) under magnetic fields exceeding 0.6 T at 2 K.The magnetic transition process of Er_(3)Si_(2)C_(2) compound was investigated and discussed.The values of the maximum magnetic entropy change(-ΔS_(M)^(max)) and the refrigeration capacity(RC) are 17 J/(kg·K)and 193 J/kg under changing magnetic fields of 0-5 T,respectively.As a potential cryogenic magnetic refrigerant,the Er_(3)Si_(2)C_(2) compound also provides an interesting research medium to study the magnetic phase transition process.

关 键 词：Magnetic materials MAGNETOCALORIC Metamagnetic transitions Magnetic phase transition Rare earths 

分 类 号：TB64[一般工业技术—制冷工程]