中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 金属研究所
  3. 中国科学院金属研究所
Metamagnetic tricritical behavior of the magnetic topological insulator MnBi4Te7

文献类型：期刊论文

作者Zhang, Hui1,2; Wu, Hengheng1,2; Liu, Daheng1,2; Huang, Jianqi1; Gao, Fei1,2; Yang, Teng1,2; Zhao, Xinguo1,2; Li, Bing1,2; Ma, Song1,2; Zhang, Zhidong1,2
刊名PHYSICAL REVIEW B
出版日期2024-06-20
卷号109期号:21页码:12
ISSN号2469-9950
DOI10.1103/PhysRevB.109.214428
通讯作者Zhao, Xinguo(xgzhao@imr.ac.cn) ; Ma, Song(songma@imr.ac.cn)
英文摘要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
语种英语
WOS记录号WOS:001269492900004
出版者AMER PHYSICAL SOC
资助机构National Key R&D Program of China ; National Natural Science Foundation of China
源URL  
专题金属研究所_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.

入库方式： OAI收割

来源：金属研究所

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。