Self-Intercalation Tunable Interlayer Exchange Coupling in a Synthetic van der Waals Antiferromagnet

Zhang, Xiaoqian1,2; Liu, Wenqing1,3; Niu, Wei4,5; Lu, Qiangsheng6; Wang, Wei7,8; Sarikhani, Ali9; Wu, Xiaohua10; Zhu, Chunhui11; Sun, Jiabao3; Vaninger, Mitchel6; Miceli, Paul F.6; Li, Jianqi11; Singh, David J.6; Hor, Yew San9; Zhao, Yue2,10; Liu, Chang2,10; He, Liang1; Zhang, Rong1; Bian, Guang6; Yu, Dapeng2; Xu, Yongbing1,12

2022-05-01

10.1002/adfm.202202977

ADVANCED FUNCTIONAL MATERIALS   影响因子和分区

1616-301X

1616-3028

One of the most promising avenues in 2D materials research is the synthesis of antiferromagnets employing 2D van der Waals (vdW) magnets. However, it has proven challenging, due in part to the complicated fabrication process and undesired adsorbates as well as the significantly deteriorated ferromagnetism at atomic layers. Here, the engineering of the antiferromagnetic (AFM) interlayer exchange coupling between atomically thin yet ferromagnetic CrTe2 layers in an ultra-high vacuum-free 2D magnetic crystal, Cr5Te8 is reported. By self-introducing interstitial Cr atoms in the vdW gaps, the emergent AFM ordering and the resultant giant magnetoresistance effect are induced. A large negative magnetoresistance (10%) with a plateau-like feature is revealed, which is consistent with the AFM interlayer coupling between the adjacent CrTe2 main layers in a temperature window of 30 K below the Neel temperature. Notably, the AFM state has a relatively weak interlayer exchange coupling, allowing a switching between the interlayer AFM and ferromagnetic states at moderate magnetic fields. This work represents a new route to engineering low-power devices that underpin the emerging spintronic technologies, and an ideal laboratory to study 2D magnetism.

GMR effect interlayer exchange coupling self-intercalation synthetic antiferromagnets van der Waals magnets

SCI ; EI

英语

NI论文

其他

National Key Research and Development Program of China["2016YFA0300803","2017YFA0206304"] ; National Basic Research Program of China[2014CB921101] ; National Natural Science Foundation of China[61427812,11774160,11574137,61474061,61674079] ; Natural Science Foundation of Jiangsu Province of China["BK20140054","BK20192006"] ; UK EPSRC[EP/S010246/1] ; Leverhulme Trust[LTSRF1819\15\12] ; Royal Society[IEC\NSFC\181680] ; China Postdoctoral Science Foundation[2021M701590] ; US National Science Foundation (NSF-DMR)[1809160] ; U.S. Department of Energy, Basic Energy Sciences[DE-SC0019114] ; Natural Science Foundation of China[11904174] ; Natural Science Foundation of Jiangsu Province[BK20190729] ; NUPTSF[NY220203] ; Diamond Light Source[MM22532]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:000798811200001

WILEY-V C H VERLAG GMBH

20222112144901

Antiferromagnetic materials ; Antiferromagnetism ; Chromium compounds ; Exchange coupling ; Ferromagnetic materials ; Ferromagnetism ; Giant magnetoresistance ; Magnets ; Tellurium compounds

Magnetism: Basic Concepts and Phenomena:701.2 ; Magnetic Materials:708.4 ; Physical Chemistry:801.4 ; Atomic and Molecular Physics:931.3

MATERIALS SCIENCE

Web of Science

1.Nanjing Univ, Jiangsu Prov Key Lab Adv Photon & Elect Mat, Sch Elect Sci & Engn, Nanjing 210093, Peoples R China
2.Southern Univ Sci & Technol, Shenzhen Inst Quantum Sci & Engn, Shenzhen 518055, Peoples R China
3.Royal Holloway Univ London, Dept Elect Engn, Egham TW20 0EX, Surrey, England
4.Nanjing Univ Posts & Telecommun, New Energy Technol Engn Lab Jiangsu Provence, Nanjing 210023, Peoples R China
5.Nanjing Univ Posts & Telecommun, Sch Sci, Nanjing 210023, Peoples R China
6.Univ Missouri, Dept Phys & Astron, Columbia, MO 65211 USA
7.Nanjing Tech Univ, Key Lab Flexible Elect, Nanjing 211816, Peoples R China
8.Nanjing Tech Univ, Inst Adv Mat, Jiangsu Natl Synerget Innovat Ctr Adv Mat, Nanjing 211816, Peoples R China
9.Missouri Univ Sci & Technol, Dept Phys, Rolla, MO 65409 USA
10.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China
11.Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
12.Univ York, York Nanjing Joint Ctr YNJC Spintron & Nano Engn, Dept Elect Engn, York YO10 3DD, N Yorkshire, England

Zhang, Xiaoqian,Liu, Wenqing,Niu, Wei,et al. Self-Intercalation Tunable Interlayer Exchange Coupling in a Synthetic van der Waals Antiferromagnet[J]. ADVANCED FUNCTIONAL MATERIALS,2022,32.

Zhang, Xiaoqian.,Liu, Wenqing.,Niu, Wei.,Lu, Qiangsheng.,Wang, Wei.,...&Xu, Yongbing.(2022).Self-Intercalation Tunable Interlayer Exchange Coupling in a Synthetic van der Waals Antiferromagnet.ADVANCED FUNCTIONAL MATERIALS,32.

Zhang, Xiaoqian,et al."Self-Intercalation Tunable Interlayer Exchange Coupling in a Synthetic van der Waals Antiferromagnet".ADVANCED FUNCTIONAL MATERIALS 32(2022).