Giant low-field magnetocaloric effect in ferromagnetically ordered Er_(1-x)Tm_(x)Al_(2)(0≤x≤1)compounds

作     者：Shuxian Yang Xinqi Zheng Dingsong Wang Juping Xu Wen Yin Lei Xi Chaofan Liu Jun Liu Jiawang Xu Hu Zhang Zhiyi Xu Lichen Wang Yihong Yao Maosen Zhang Yichi Zhang Jianxin Shen Shouguo Wang Baogen Shen Shuxian Yang;Xinqi Zheng;Dingsong Wang;Juping Xu;Wen Yin;Lei Xi;Chaofan Liu;Jun Liu;Jiawang Xu;Hu Zhang;Zhiyi Xu;Lichen Wang;Yihong Yao;Maosen Zhang;Yichi Zhang;Jianxin Shen;Shouguo Wang;Baogen Shen

作者机构：School of Materials Science and EngineeringBeijing Advanced Innovation Center for Materials Genome EngineeringUniversity of Science and Technology BeijingBeijing 100083China Beijing National Laboratory for Condensed Matter PhysicsInstitute of PhysicsChinese Academy of Sciences&University of Chinese Academy of SciencesBeijing 100190China Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Spallation Neutron Source Science CenterDongguan 523803China School of Materials Science and EngineeringAnhui UniversityHefei 230601China Department of Energy and Power EngineeringSchool of Mechanical EngineeringBeijing Institute of TechnologyBeijing 100081China Songshan Lake Materials LaboratoryDongguan 523808China Ganjiang Innovation AcademyChinese Academy of SciencesGanzhou 341000China Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2023年第146卷第15期

页      面：168-176页

核心收录：

学科分类：0806[工学-冶金工程] 0817[工学-化学工程与技术] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0802[工学-机械工程] 0702[理学-物理学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：supported by the National Key Research and Development Program of China(Nos.2021YFB3501202 and 2019YFB2005800) the Science Center of the National Science Foundation of China(No.52088101) the National Natural Science Foundation of China(Nos.51871019,52171170,52130103,51961145305,51971026,and 52171169) the Beijing Natural Science Foundation Key Program(Grant Nos.Z190007 and Z200007),and“111 Project”(No.B170003) 

主　　题：Magnetocaloric effect Low field magnetocaloric effect Magnetic structure RAl_(2)compounds 

摘      要：Magnetocaloric material is the key working substance for magnetic refrigerant technology,for which the low-field and low-temperature magnetocaloric effect(MCE)performance is of great importance for practical applications at low ***,a giant low-field magnetocaloric effect in ferromagnetically ordered Er_(1-x)Tm_(x)Al_(2)(0≤x≤1)compounds was reported,and the magnetic structure was characterized based on low-temperature neutron powder *** increasing Tm content from 0 to 1,the Curie temperature of Er_(1-x)Tm_(x)Al_(2)(0≤x≤1)compounds decreases from 16.0 K to 3.6 *** Er_(0.7)Tm_(0.3)Al_(2) compound,it showed the largest low-field magnetic entropy change(–SM)with the peak value of 17.2 and 25.7 J/(kg K)for 0–1 T and 0–2 T,***(–SM)max up to 17.2 J/(kg K)of Er0.7Tm0.3Al2 compound for 0–1 T is the largest among the intermetallic magnetocaloric materials ever reported at temperatures below 20 *** peak value of adiabatic temperature change(Tad)max was determined as 4.13 K and 6.87 K for 0–1 T and 0–2 T,*** characteristic of second-order magnetic transitions was confirmed on basis of Arrott plots,the quantitative criterion of exponent n,rescaled universal curves,and the mean-field theory *** outstanding low-field MCE performance with low working temperatures indicates that Er_(1-x)Tm_(x)Al_(2)(0≤x≤1)compounds are promising candidates for magnetic cooling materials at liquid hydrogen and liquid helium temperatures.