Transition from an incommensurate spin density wave to a commensurate magnetic order in a triangular lattice compound Ho2PdAl6Ge4

doi:10.1016/j.jallcom.2024.174975

IMR OpenIR

	Transition from an incommensurate spin density wave to a commensurate magnetic order in a triangular lattice compound Ho2PdAl6Ge4
	Wu, Hengheng 1,2; Zhang, Lei 1; Ren, Weijun 1,2; Zhang, Qiang 3; Gao, Fei 1,2; An, Meng 1,2; Li, Bing 1,2; Zhang, Zhidong 1,2
通讯作者	Ren, Weijun(wjren@imr.ac.cn) ; Zhang, Qiang(zhangq6@ornl.gov) ; Li, Bing(bingli@imr.ac.cn)
	2024-09-05
发表期刊	JOURNAL OF ALLOYS AND COMPOUNDS
ISSN	0925-8388
卷号	998 页码:8
摘要	Rare-earth (RE) intermetallics on a triangular lattice are promising candidates for generating interesting magnetic phases due to the complex interplay between Ruderman-Kittel-Kasuya-Yoshida (RKKY) interaction and geometrical frustration. Here we report the exotic magnetic structure of a layered compound Ho2PdAl6Ge4 with triangular lanthanide nets. Magnetization and heat capacity measurements in zero magnetic field reveal two magnetic phase transitions at TN1 = 10.8 K and TN2 = 6.0 K. Neutron powder diffraction demonstrates a commensurate antiferromagnetic phase with k1 = (0, 0, 1.5) below TN2. With increasing temperature, another incommensurate vector appears and therefore, the magnetic structure of the intermediate state is identified as an unusual incommensurate spin density wave with two propagation vectors k1 = (0, 0, 1.5) and k2 = (0.0492, 0.0492, 1.5). The magnetic moments in the intermediate state rotate continuously and form an unusual S-shaped wave arrangement in the ab plane, sharing similarities with typical cycloid and helix magnetic orders. These results identify Ho2PdAl6Ge4 as a candidate for exploring field-induced topological magnetic phases such as skyrmions, opening the way for further investigations on the family of RE2PdAl6Ge4 materials.
关键词	Ho 2 PdAl 6 Ge 4 Rare-earth compound Magnetic properties Magnetic structure Spin density wave
资助者	Ministry of Science and Technology of China ; National Natural Science Foundation of China
DOI	10.1016/j.jallcom.2024.174975
收录类别	SCI
语种	英语
资助项目	Ministry of Science and Technology of China[2021YFB3501201] ; Ministry of Science and Technology of China[2020YFA0406002] ; National Natural Science Foundation of China[52071323]
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:001247187700001
出版者	ELSEVIER SCIENCE SA
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/187036
专题	中国科学院金属研究所
通讯作者	Ren, Weijun; Zhang, Qiang; Li, Bing
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.Neutron Sci Div, Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA
推荐引用方式 GB/T 7714	Wu, Hengheng,Zhang, Lei,Ren, Weijun,et al. Transition from an incommensurate spin density wave to a commensurate magnetic order in a triangular lattice compound Ho2PdAl6Ge4[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2024,998:8.
APA	Wu, Hengheng.,Zhang, Lei.,Ren, Weijun.,Zhang, Qiang.,Gao, Fei.,...&Zhang, Zhidong.(2024).Transition from an incommensurate spin density wave to a commensurate magnetic order in a triangular lattice compound Ho2PdAl6Ge4.JOURNAL OF ALLOYS AND COMPOUNDS,998,8.
MLA	Wu, Hengheng,et al."Transition from an incommensurate spin density wave to a commensurate magnetic order in a triangular lattice compound Ho2PdAl6Ge4".JOURNAL OF ALLOYS AND COMPOUNDS 998(2024):8.