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Incommensurate spin density wave and magnetocaloric effect in the metallic triangular lattice HoAl2Ge2 br

文献类型：期刊论文

作者Gao, Fei6,7; Sheng, Jieming3,4; Ren, Weijun6,7; Zhang, Qiang1; Luo, Xiaohua5; Qi, Ji6,7; Cong, Mengru6,7; Li, Bing6,7; Wu, Liusuo2,4; Zhang, Zhidong6,7
刊名PHYSICAL REVIEW B
出版日期2022-10-21
卷号106期号:13页码:8
ISSN号2469-9950
DOI10.1103/PhysRevB.106.134426
通讯作者Sheng, Jieming(shengjm@sustech.edu.cn)
英文摘要We report the magnetic structure and the magnetocaloric effect (MCE) of the ternary compound HoAl2Ge2 with a trigonal CaAl2Si2-type crystal structure. A neutron powder diffraction experiment reveals that HoAl2Ge2 exhibits an incommensurate spin density wave (SDW) with a propagation vector k = (0.23, 0, 0.06). The special arrangement of magnetic moments in HoAl2Ge2 induces interesting physical phenomena and large magnetocaloric effects. The rise in resistivity at low temperatures indicates the effect of the SDW state in the electronic transport. The maximum magnetic-entropy change is -16.1 J/kg K under a magnetic field change of 0-70 kOe for an isotropic HoAl2Ge2 powder and it increases to -17.9 J/kg K for a single crystal when the magnetic field (H) is applied parallel to the ab plane. A large rotating magnetic-entropy change of -5.1 J/kg K for H = 20 kOe in a HoAl2Ge2 single crystal is obtained, which is closely associated to the magnetic anisotropy of the SDW order and its response to the external magnetic field. We discuss the large MCE in terms of the field-induced metamagnetic transition from the incommensurate SDW order to the ferromagnetic order. Our study establishes the triangular lattice RAl2Ge2 (R = rare-earth elements) as a unique family of compounds to explore the existence of the incommensurate spin density waves and the correlated physical properties.
资助项目Ministry of Science and Technology of China[2020YFA0406002] ; Ministry of Science and Technology of China[2021YFB3501201] ; National Natural Science Foundation of China[52071323] ; National Natural Science Foundation of China[12104255] ; National Natural Science Foundation of China[52031014] ; National Natural Science Foundation of China[12134020]
WOS研究方向Materials Science ; Physics
语种英语
出版者AMER PHYSICAL SOC
WOS记录号WOS:000878645700002
资助机构Ministry of Science and Technology of China ; National Natural Science Foundation of China
源URL[http://ir.imr.ac.cn/handle/321006/176626]  
专题金属研究所_中国科学院金属研究所
通讯作者Sheng, Jieming
作者单位1.Oak Ridge Natl Lab, Neutron Sci Div, Oak Ridge, TN 37831 USA
2.Southern Univ Sci & Technol, Shenzhen Key Lab Adv Quantum Funct Mat & Devices, Shenzhen 518055, Peoples R China
3.Southern Univ Sci & Technol, Acad Adv Interdisciplinary Studies, Shenzhen 518055, Peoples R China
4.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China
5.Jiangxi Univ Sci & Technol, Coll Rare Earths, Jiangxi Key Lab Rare Earth Magnet Mat & Devices, Ganzhou 341000, Peoples R China
6.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China
7.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
推荐引用方式
GB/T 7714		 Gao, Fei,Sheng, Jieming,Ren, Weijun,et al. Incommensurate spin density wave and magnetocaloric effect in the metallic triangular lattice HoAl2Ge2 br[J]. PHYSICAL REVIEW B,2022,106(13):8.
APA Gao, Fei.,Sheng, Jieming.,Ren, Weijun.,Zhang, Qiang.,Luo, Xiaohua.,...&Zhang, Zhidong.(2022).Incommensurate spin density wave and magnetocaloric effect in the metallic triangular lattice HoAl2Ge2 br.PHYSICAL REVIEW B,106(13),8.
MLA Gao, Fei,et al."Incommensurate spin density wave and magnetocaloric effect in the metallic triangular lattice HoAl2Ge2 br".PHYSICAL REVIEW B 106.13(2022):8.

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来源：金属研究所

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