Coexistence of Magnetic Orders in Two-Dimensional Magnet CrI3

Niu, Ben; Su, Tang; Francisco, Brian A.; Ghosh, Subhajit; Kargar, Fariborz; Huang, Xiong; Lohmann, Mark; Li, Junxue; Xu, Yadong; Taniguchi, Takashi; Watanabe, Kenji; Wu, Di; Balandin, Alexander; Shi, Jing; Cui, Yong-Tao

doi:10.1021/acs.nanolett.9b04282

Coexistence of Magnetic Orders in Two-Dimensional Magnet CrI3

Journal Article · Tue Nov 26 00:00:00 EST 2019 · Nano Letters

DOI:https://doi.org/10.1021/acs.nanolett.9b04282· OSTI ID:1800445

Niu, Ben ^[1]; Su, Tang ^[2]; Francisco, Brian A. ^[2]; Ghosh, Subhajit ^[2]; ^[2]; Huang, Xiong ^[2]; Lohmann, Mark ^[2]; Li, Junxue ^[2]; Xu, Yadong ^[2]; Taniguchi, Takashi ^[3]; Watanabe, Kenji ^[3]; ^[4]; Balandin, Alexander ^[2]; ^[2]; ^[2]

Nanjing Univ. (China); Univ. of California, Riverside, CA (United States); OSTI
Univ. of California, Riverside, CA (United States)
National Institute for Materials Science, Tsukuba (Japan)
Nanjing Univ. (China)

The magnetic properties in two-dimensional van der Waals materials depend sensitively on structure. CrI₃, as an example, has been recently demonstrated to exhibit distinct magnetic properties depending on the layer thickness and stacking order. Bulk CrI₃ is ferromagnetic (FM) with a Curie temperature of 61 K and a rhombohedral layer stacking, whereas few-layer CrI₃ has a layered antiferromagnetic (AFM) phase with a lower ordering temperature of 45 K and a monoclinic stacking. In this work, we use cryogenic magnetic force microscopy to investigate CrI₃ flakes in the intermediate thickness range (25–200 nm) and find that the two types of magnetic orders, hence the stacking orders, can coexist in the same flake with a layer of ~13 nm at each surface being in the layered AFM phase similar to few-layer CrI₃ and the rest in the bulk FM phase. The switching of the bulk moment proceeds through a remnant state with nearly compensated magnetic moment along the c-axis, indicating formation of c-axis domains allowed by a weak interlayer coupling strength in the rhombohedral phase. Our research provides a comprehensive picture on the magnetism in CrI₃ and point to the possibility of engineering magnetic heterostructures within the same material.

View Accepted Manuscript (DOE)

Research Organization:: Univ. of California, Riverside, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: FG02-07ER46351

OSTI ID:: 1800445

Journal Information:: Nano Letters, Journal Name: Nano Letters Journal Issue: 1 Vol. 20; ISSN 1530-6984

Publisher:: American Chemical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
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Layers
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Magnetization switching
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Coexistence of Magnetic Orders in Two-Dimensional Magnet CrI3

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