Field-induced tricritical phenomenon and magnetic structures in magnetic Weyl semimetal candidate NdAlGe

doi:10.1088/1367-2630/ac430a

	Field-induced tricritical phenomenon and magnetic structures in magnetic Weyl semimetal candidate NdAlGe
	Zhao, Jun 2,3,4; Liu, Wei 5,6; Rahman, Azizur 2,3; Meng, Fanying 2,3,4; Ling, Langsheng 2,4; Xi, Chuanying 2,4; Tong, Wei 2,4; Bai, Yuming 7,8; Tian, Zhaoming 7,8; Zhong, Yunbo 9
刊名	NEW JOURNAL OF PHYSICS
	2022
卷号	24
关键词	critical phenomenon anisotropy critical exponent scaling phase diagram
ISSN号	1367-2630
DOI	10.1088/1367-2630/ac430a
通讯作者	Tian, Zhaoming(tianzhaoming@hust.edu.cn) ; Zhang, Lei(zhanglei@hmfl.ac.cn)
英文摘要	Non-centrosymmetric NdAlGe is considered to be a candidate for magnetic Weyl semimetal in which the Weyl nodes can be moved by magnetization. Clarification of the magnetic structures and couplings in this system is thus crucial to understand its magnetic topological properties. In this work, we conduct a systematical study of magnetic properties and critical behaviors of single-crystal NdAlGe. Angle-dependent magnetization exhibits strong magnetic anisotropy along the c-axis and absolute isotropy in the ab-plane. The study of critical behavior with H parallel to c gives critical exponents beta = 0.236(2), gamma = 0.920(1), and delta = 4.966(1) at critical temperature T (C) = 5.2(2) K. Under the framework of the universality principle, M(T, H) curves are scaled into universality curves using these critical exponents, demonstrating reliability and self-consistency of the obtained exponents. The critical exponents of NdAlGe are close to the theoretical prediction of a tricritical mean-field model, indicating a field-induced tricritical behavior. Based on the scaling analysis, a H-T phase diagram for NdAlGe with H parallel to c is constructed, revealing a ground state with an up-up-down spin configuration. The phase diagram unveils multiple phases including up-up-down domains, up-up-down ordering state, polarized ferromagnetic (PFM), and paramagnetic (PM) phases, with a tricritical point (TCP) located at the intersection [T (TCP) = 5.27(1) K, H (TCP) = 30.1(3) kOe] of up-up-down, PFM, and PM phases. The multiple phases and magnetic structures imply a delicate competition and balance between variable interactions and couplings, laying a solid foundation for unveiling topological properties and critical phenomena in this system.
资助项目	National Key R&D Program of China[2017YFA0303201] ; National Natural Science Foundation of China[12074386] ; National Natural Science Foundation of China[11874358] ; National Natural Science Foundation of China[11874158] ; National Natural Science Foundation of China[U1732276] ; National Natural Science Foundation of China[11574322] ; Alliance of International Science Organizations[ANSO-VF-2021-03] ; Collaborative Innovation Program of Hefei Science Center, CAS[2021HSC-CIP006] ; Anhui University Scientific Research Startup Fund[S020318006/023] ; Key Project of Natural Scientific Research of Universities in Anhui Province[K120462009] ; High Magnetic Field Laboratory of Anhui Province
WOS关键词	EQUATION-OF-STATE ; ULTRAHIGH MOBILITY ; MAGNETORESISTANCE
WOS研究方向	Physics
语种	英语
出版者	IOP Publishing Ltd
WOS记录号	WOS:000738244800001
资助机构	National Key R&D Program of China ; National Natural Science Foundation of China ; Alliance of International Science Organizations ; Collaborative Innovation Program of Hefei Science Center, CAS ; Anhui University Scientific Research Startup Fund ; Key Project of Natural Scientific Research of Universities in Anhui Province ; High Magnetic Field Laboratory of Anhui Province
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/127207]
专题	中国科学院合肥物质科学研究院
通讯作者	Tian, Zhaoming; Zhang, Lei
作者单位	1.Hefei Univ Technol, Sch Mat Sci & Engn, Inst Ind & Equipment Technol, Anhui Prov Key Lab Aerosp Struct Parts Forming Te, Hefei 230009, Peoples R China 2.Chinese Acad Sci, Hefei Inst Phys Sci, Anhui Key Lab Condensed Matter Phys Extreme Condi, High Magnet Field Lab, Hefei 230031, Peoples R China 3.Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Peoples R China 4.High Magnet Field Lab Anhui Prov, Hefei 230031, Peoples R China 5.Anhui Univ, Inst Phys Sci, Hefei 230601, Peoples R China 6.Anhui Univ, Inst Informat Technol, Hefei 230601, Peoples R China 7.Huazhong Univ Sci & Technol, Wuhan Natl High Magnet Field Ctr, Wuhan 430074, Peoples R China 8.Huazhong Univ Sci & Technol, Sch Phys, Wuhan 430074, Peoples R China 9.Shanghai Univ, Sch Mat Sci & Engn, State Key Lab Adv Special Steel, Shanghai Key Lab Adv Ferromet, Shanghai 200444, Peoples R China 10.Hefei Univ Technol, Sch Mat Sci & Engn, Key Lab Adv Funct Mat & Devices Anhui Prov, Hefei 230009, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Jun,Liu, Wei,Rahman, Azizur,et al. Field-induced tricritical phenomenon and magnetic structures in magnetic Weyl semimetal candidate NdAlGe[J]. NEW JOURNAL OF PHYSICS,2022,24.
APA	Zhao, Jun.,Liu, Wei.,Rahman, Azizur.,Meng, Fanying.,Ling, Langsheng.,...&Zhang, Yuheng.(2022).Field-induced tricritical phenomenon and magnetic structures in magnetic Weyl semimetal candidate NdAlGe.NEW JOURNAL OF PHYSICS,24.
MLA	Zhao, Jun,et al."Field-induced tricritical phenomenon and magnetic structures in magnetic Weyl semimetal candidate NdAlGe".NEW JOURNAL OF PHYSICS 24(2022).