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Tunning the magnetism and magnetocaloric effects of EuAl4 single crystals by Si and Cu doping

文献类型：期刊论文

作者Wang, Sujuan1,5; Luo, Qing1,4,5; Luo, Xiaohua1,5; Ma, Shengcan1,4,5; Chen, Changcai1,5; Gao, Fei2,3; Lv, Bodong1,5; Zhong, Rui1,5; Ren, Weijun3; Zhong, Zhenchen1,4,5
刊名JOURNAL OF ALLOYS AND COMPOUNDS
出版日期2023-12-15
卷号968页码:10
关键词Magnetism Magnetic refrigeration Magnetocaloric effect Single crystals
ISSN号0925-8388
DOI10.1016/j.jallcom.2023.171977
通讯作者Luo, Xiaohua(xhluo11s@alum.imr.ac.cn) ; Ma, Shengcan(shengcanma801@gmail.com)
英文摘要The effects of Si and Cu doping on crystal structures, magnetism, and the magnetocaloric effect of EuAl4 have been investigated. EuAl4, EuAl3.35Si0.65, and EuAl3.82Cu0.18 single crystals grown by the Al flux method are isotypic and crystallize in BaAl4-type structure with space group I4/mmm. Compared to the pristine compound EuAl4, the lattice parameter a keeps almost unchanged and c decreases obviously by Si doping, while a decreases and c increases upon Cu-substitution. These irregular changes in the lattice parameters may contribute to the electronegativity difference between Si and Cu. Cu and Si doping enhances the ferromagnetic interaction, and the direction of easy magnetization changes from the ab plane to the c axis upon the Cu-substitution. Multiple-step metamagnetic transitions are still observed in EuAl3.35Si0.65 as applying the magnetic field along the c axis, while EuAl3.82Cu0.18 shows ferromagnetic behavior along the ab plane and c axis. As a consequence, the low-field magnetocaloric effect is significantly enhanced. The maximum magnetic entropy change under a field change of 20 kOe increases from -8.4 J/kg K for EuAl4 to -12.9 J/kg K for EuAl3.35Si0.65 and -15.9 J/kg K for EuAl3.82Cu0.18. The corresponding values of refrigerating capacity are 67, 140, and 147 J/kg, respectively. The remarkable magnetocaloric performances suggest that the Cu-doped EuAl4 compound is an excellent candidate material for low-temperature magnetic refrigeration.
资助项目Natural Science Foundation of Jiangxi Province[20202BAB214002] ; Natural Science Foundation of Jiangxi Province[20202BABL214012] ; National Natural Science Foundation of China[52101223] ; National Natural Science Foundation of China[52061014] ; National Natural Science Foundation of China[52071323] ; Leading Talents Program of Jiangxi Provincial Major Discipline Academic and Technical Leaders Training Program[20204BCJ22004] ; Key Project of Natural Science Foundation of Jiangxi Province[20192ACB20004]
WOS研究方向Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
语种英语
WOS记录号WOS:001074143900001
出版者ELSEVIER SCIENCE SA
资助机构Natural Science Foundation of Jiangxi Province ; National Natural Science Foundation of China ; Leading Talents Program of Jiangxi Provincial Major Discipline Academic and Technical Leaders Training Program ; Key Project of Natural Science Foundation of Jiangxi Province
源URL[http://ir.imr.ac.cn/handle/321006/179256]  
专题金属研究所_中国科学院金属研究所
通讯作者Luo, Xiaohua; Ma, Shengcan
作者单位1.Jiangxi Univ Sci & Technol, Coll Rare Earths, Jiangxi Key Lab Rare Earth Magnet Mat & Devices, Ganzhou Key Lab Rare Earth Magnet Funct Mat & Phys, Ganzhou 341000, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
3.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
4.Jiangxi Univ Sci & Technol, Fac Mat Met & Chem, Sch Mat Sci & Engn, Ganzhou 341000, Peoples R China
5.Jiangxi Univ Sci & Technol, Natl Rare Earth Funct Mat Innovat Ctr, Ganzhou 341000, Peoples R China
推荐引用方式
GB/T 7714		 Wang, Sujuan,Luo, Qing,Luo, Xiaohua,et al. Tunning the magnetism and magnetocaloric effects of EuAl4 single crystals by Si and Cu doping[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2023,968:10.
APA Wang, Sujuan.,Luo, Qing.,Luo, Xiaohua.,Ma, Shengcan.,Chen, Changcai.,...&Zhong, Zhenchen.(2023).Tunning the magnetism and magnetocaloric effects of EuAl4 single crystals by Si and Cu doping.JOURNAL OF ALLOYS AND COMPOUNDS,968,10.
MLA Wang, Sujuan,et al."Tunning the magnetism and magnetocaloric effects of EuAl4 single crystals by Si and Cu doping".JOURNAL OF ALLOYS AND COMPOUNDS 968(2023):10.

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来源：金属研究所

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