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

doi:10.1016/j.jallcom.2023.171977

IMR OpenIR

	Tunning the magnetism and magnetocaloric effects of EuAl4 single crystals by Si and Cu doping
	Wang, Sujuan 1,2; Luo, Qing 1,2,3; Luo, Xiaohua 1,2; Ma, Shengcan 1,2,3; Chen, Changcai 1,2; Gao, Fei 4,5; Lv, Bodong 1,2; Zhong, Rui 1,2; Ren, Weijun 4; Zhong, Zhenchen 1,2,3
通讯作者	Luo, Xiaohua(xhluo11s@alum.imr.ac.cn) ; Ma, Shengcan(shengcanma801@gmail.com)
	2023-12-15
发表期刊	JOURNAL OF ALLOYS AND COMPOUNDS
ISSN	0925-8388
卷号	968 页码:10
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.
关键词	Magnetism Magnetic refrigeration Magnetocaloric effect Single crystals
资助者	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
DOI	10.1016/j.jallcom.2023.171977
收录类别	SCI
语种	英语
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
WOS类目	Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001074143900001
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：3[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/179257
专题	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.Jiangxi Univ Sci & Technol, Natl Rare Earth Funct Mat Innovat Ctr, Ganzhou 341000, Peoples R China 3.Jiangxi Univ Sci & Technol, Fac Mat Met & Chem, Sch Mat Sci & Engn, Ganzhou 341000, Peoples R China 4.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 5.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, 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.