Metamagnetic tricritical behavior of the magnetic topological insulator MnBi<sub>4</sub>Te<sub>7</sub>

doi:10.1103/PhysRevB.109.214428

IMR OpenIR

	Metamagnetic tricritical behavior of the magnetic topological insulator MnBi₄Te₇
	Zhang, Hui 1,2; Wu, Hengheng 1,2; Liu, Daheng 1,2; Huang, Jianqi 1; Gao, Fei 1,2; Yang, Teng 1,2; Zhao, Xinguo 1,2; Li, Bing 1,2; Ma, Song 1,2; Zhang, Zhidong 1,2
通讯作者	Zhao, Xinguo(xgzhao@imr.ac.cn) ; Ma, Song(songma@imr.ac.cn)
	2024-06-20
发表期刊	PHYSICAL REVIEW B
ISSN	2469-9950
卷号	109 期号:21 页码:12
摘要	We report temperature and magnetic field dependences of the magnetization and ac susceptibility of MnBi 4 Te 7 , aiming to construct a magnetic phase diagram for H II [001]. Its spin Hamiltonian can be described as an Ising model for a metamagnet. The superlattice structure of MnBi 2 Te 4 (Bi 2 Te 3 ) n facilitates the reduction of interlayer antiferromagnetic interaction. As predicted by the model, there is a tricritical point in the phase diagram when the ratio of the intralayer to interlayer interaction is less than - 3 / 5. The tricritical point is determined to be (12.4 K, 660 Oe) by the imaginary part of ac susceptibility due to the dissipation of domain walls of the mixed phase. The effective tricritical exponents, fi eff 2- 1 . 10, delta eff 2- 1 . 65, have been obtained and differ from the mean-field exponents. When the logarithmic correction factor \| ln \| t \|\| 0.5 is included, the data collapse with the mean-field power law. These findings were tested against the tricritical scaling hypothesis. The deviation from the Landau theoretical values results from the logarithmic correction, similar to another layered metamagnet FeCl 2 . As a member of the intrinsic magnetic topological insulator family, MnBi 4 Te 7 features a tricritical point in its magnetic phase diagram, providing a solid foundation for future research on topological transitions and tricriticality.
资助者	National Key R&D Program of China ; National Natural Science Foundation of China
DOI	10.1103/PhysRevB.109.214428
收录类别	SCI
语种	英语
资助项目	National Key R&D Program of China[2022YFA1203903] ; National Natural Science Foundation of China[52071324] ; National Natural Science Foundation of China[52271192] ; National Natural Science Foundation of China[52031014]
WOS研究方向	Materials Science ; Physics
WOS类目	Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
WOS记录号	WOS:001269492900004
出版者	AMER PHYSICAL SOC
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/188213
专题	中国科学院金属研究所
通讯作者	Zhao, Xinguo; Ma, Song
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Hui,Wu, Hengheng,Liu, Daheng,et al. Metamagnetic tricritical behavior of the magnetic topological insulator MnBi₄Te₇[J]. PHYSICAL REVIEW B,2024,109(21):12.
APA	Zhang, Hui.,Wu, Hengheng.,Liu, Daheng.,Huang, Jianqi.,Gao, Fei.,...&Zhang, Zhidong.(2024).Metamagnetic tricritical behavior of the magnetic topological insulator MnBi₄Te₇.PHYSICAL REVIEW B,109(21),12.
MLA	Zhang, Hui,et al."Metamagnetic tricritical behavior of the magnetic topological insulator MnBi₄Te₇".PHYSICAL REVIEW B 109.21(2024):12.