Spin freezing in the van der Waals material Mn2Ga2S5

doi:10.1088/1674-1056/ac657c

	Spin freezing in the van der Waals material Mn2Ga2S5
	Shen, Jie 1,2; Xu, Xitong 2; He, Miao 1,2; Liu, Yonglai 1,2; Han, Yuyan 1,2; Qu, Zhe 1,2
刊名	CHINESE PHYSICS B
	2022-06-01
卷号	31
关键词	geometrical frustration van der Waals material spin freezing
ISSN号	1674-1056
DOI	10.1088/1674-1056/ac657c
通讯作者	Qu, Zhe(zhequ@hmfl.ac.cn)
英文摘要	Geometrical frustration in low-dimensional magnetic systems has been an intriguing research aspect, where the suppression of conventional magnetic order may lead to exotic ground states such as spin glass or spin liquid. In this work we report the synthesis and magnetism study of the monocrystalline Mn2Ga2S5, featuring both the van der Waals structure and a bilayered triangular Mn lattice. Magnetic susceptibility reveals a significant antiferromagnetic interaction with a Curie-Weiss temperature theta (w) similar to -260 K and a high spin S = 5/2 Mn2+ state. However, no long range magnetic order has been found down to 2 K, and a spin freezing transition is found to occur at around 12 K well below its theta (w). This yields a frustration index of f = -theta (w)/T (f) approximate to 22, an indication that the system is highly frustrated. The absence of a double-peak structure in magnetic specific heat compared with the TM S-2(4) compounds implies that the spin freezing behavior in Mn2Ga2S5 is a result of the competition between exchange interactions and the 2D crystalline structure. Our results suggest that the layered Mn2Ga2S5 would be an excellent candidate for investigating the physics of 2D magnetism and spin disordered state.
资助项目	National Natural Science Foundation of China[U1832214] ; National Natural Science Foundation of China[11774007] ; National Natural Science Foundation of China[U2032213] ; National Natural Science Foundation of China[12104461]
WOS关键词	MAGNETIC-PROPERTIES ; FRUSTRATION
WOS研究方向	Physics
语种	英语
出版者	IOP Publishing Ltd
WOS记录号	WOS:000807771400001
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/131163]
专题	中国科学院合肥物质科学研究院
通讯作者	Qu, Zhe
作者单位	1.Univ Sci & Technol China, Sci Isl Branch, Grad Sch, Hefei 230026, Peoples R China 2.Chinese Acad Sci, Anhui Prov Key Lab Condensed Matter Phys Extreme, CAS Key Lab Photovolta & Energy Conservat Mat, High Magnet Field Lab,Hefei Inst Phys Sci, Hefei 230031, Peoples R China
推荐引用方式 GB/T 7714	Shen, Jie,Xu, Xitong,He, Miao,et al. Spin freezing in the van der Waals material Mn2Ga2S5[J]. CHINESE PHYSICS B,2022,31.
APA	Shen, Jie,Xu, Xitong,He, Miao,Liu, Yonglai,Han, Yuyan,&Qu, Zhe.(2022).Spin freezing in the van der Waals material Mn2Ga2S5.CHINESE PHYSICS B,31.
MLA	Shen, Jie,et al."Spin freezing in the van der Waals material Mn2Ga2S5".CHINESE PHYSICS B 31(2022).