Sign-tunable exchange bias effect in proton-intercalated F<sub>e3</sub>GaTe<sub>2</sub> nanoflakes

doi:10.1103/PhysRevB.107.L140409

	Sign-tunable exchange bias effect in proton-intercalated F_e3GaTe₂ nanoflakes
	Wang, Chunsheng 8,9; Wang, Jie 8; Xie, Wen-Qiang 6,7; Zhang, Gaojie 3,4,5; Wu, Hao 3,4,5; Zhou, Jianhui 8; Zhu, Xiangde 8; Ning, Wei 8; Wang, Guopeng 9; Tan, Cheng 2
刊名	PHYSICAL REVIEW B
	2023-04-20
卷号	107
ISSN号	2469-9950
DOI	10.1103/PhysRevB.107.L140409
通讯作者	Zhao, Yu-Jun(zhaoyj@scut.edu.cn) ; Chang, Haixing(hxchang@hust.edu.cn) ; Zheng, Guolin(glzheng@hmfl.ac.cn)
英文摘要	The exchange-bias (EB) effect, usually arising in ferromagnetic (FM)-antiferromagnetic (AFM) interfaces with uniaxial magnetic anisotropy, holds high potentials in spintronic applications. Here, we report both field-cooling and zero-field cooling EB effects with a maximal EB field \|H-EB\| reaches up to 3859 Oe in above-room-temperature van der Waals (vdW) ferromagnet Fe3GaTe2 nanoflakes at low temperatures. The observed intrinsic EB effects can be largely tuned via the gate-induced proton intercalation. Moreover, we observe an unusual sign-tunable EB effect under different gate voltages after +/- 2 T field cooling, leading to a crossover between positive and negative EB effects. Theoretical analysis based on density functional theory indicates that the magnetic coupling at the FM/AFM interface in proton-intercalated Fe3GaTe2 is highly controllable and can be tuned to be FMI-1 (down arrow /down arrow down arrow, positive EB) or FMI-2 ( up arrow /down arrow up arrow, negative EB) magnetic configurations, depending on different H-absorption sites. Our experiments offer a knob to control the sign of EB effects and further open opportunities for more applicable spintronic devices in high-temperature vdW ferromagnets.
资助项目	National Key R&D Program of the MOST of China[2022YFA1602603] ; National Key R&D Program of the MOST of China[2022YFE0134600] ; Natural Science Foundation of China[12274413] ; Natural Science Foundation of China[U19A2093] ; Natural Science Foundation of China[12074126] ; Natural Science Foundation of China[52272152] ; Natural Science Foundation of China[U2032164] ; Natural Science Foundation of China[12174394] ; Collaborative Innovation Program of Hefei Science Center, CAS[2022HSC-CIP017] ; Foundation for Innovative Research Groups of the National Natural Science Foundation of China[51621001]
WOS关键词	RANDOM-FIELD MODEL ; INTRINSIC FERROMAGNETISM ; TEMPERATURE
WOS研究方向	Materials Science ; Physics
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:001065400800009
资助机构	National Key R&D Program of the MOST of China ; Natural Science Foundation of China ; Collaborative Innovation Program of Hefei Science Center, CAS ; Foundation for Innovative Research Groups of the National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/132480]
专题	中国科学院合肥物质科学研究院
通讯作者	Zhao, Yu-Jun; Chang, Haixing; Zheng, Guolin
作者单位	1.Huazhong Univ Sci & Technol HUST, Shenzhen R& Ctr, Shenzhen 518000, Peoples R China 2.RMIT Univ, Sch Sci, Melbourne, Vic 3001, Australia 3.Huazhong Univ Sci & Technol, Inst Quantum Sci & Engn, Wuhan 430074, Peoples R China 4.Huazhong Univ Sci & Technol, Wuhan Natl High Magnet Field Ctr, Wuhan 430074, Peoples R China 5.Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, Ctr Joining & Elect Packaging, State Key Lab Mat Proc & Die & Mold Technol, Wuhan 430074, Peoples R China 6.South China Univ Technol, Dept Phys, Guangzhou 510640, Peoples R China 7.Hainan Univ, Sch Mat Sci & Engn, Haikou 570228, Peoples R China 8.Chinese Acad Sci, Anhui Prov Key Lab Condensed Matter Phys Extreme, High Magnet Field Lab, Hefei 230031, Anhui, Peoples R China 9.Anhui Univ, Sch Phys & Optoelect Engn, Hefei 230601, Anhui, Peoples R China
推荐引用方式 GB/T 7714	Wang, Chunsheng,Wang, Jie,Xie, Wen-Qiang,et al. Sign-tunable exchange bias effect in proton-intercalated F_e3GaTe₂ nanoflakes[J]. PHYSICAL REVIEW B,2023,107.
APA	Wang, Chunsheng.,Wang, Jie.,Xie, Wen-Qiang.,Zhang, Gaojie.,Wu, Hao.,...&Tian, Mingliang.(2023).Sign-tunable exchange bias effect in proton-intercalated F_e3GaTe₂ nanoflakes.PHYSICAL REVIEW B,107.
MLA	Wang, Chunsheng,et al."Sign-tunable exchange bias effect in proton-intercalated F_e3GaTe₂ nanoflakes".PHYSICAL REVIEW B 107(2023).