van der Waals Magnets: Material Family, Detection and Modulation of Magnetism, and Perspective in Spintronics

Yang, Shengxue; Zhang, Tianle; Jiang, Chengbao

doi:10.1002/advs.202002488

Cited by 77 publications

(49 citation statements)

References 187 publications

(452 reference statements)

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“…For instance, Huang et al reported extraordinarily large magneto-optical Raman effects of A1g phonon 2D magnet CrI3 due to spin-phonon coupling (Fig. 13d, e) 440,441 . Deep insights are needed on the observation of forbidden Raman modes, including new edge modes related to electromagnetic field distortion of incident and scattered light 442 , acoustic phonons under double-resonance excitation 443 and cross-dimensional electron-phonon coupling between 3D phonons and 2D excitons 444 .…”

Section: Raman Scatteringmentioning

confidence: 99%

Recent Progress on Two-Dimensional Materials

Chang¹,

Chen²,

Chen³

et al. 2021

Acta Physico Chimica Sinica

310

119

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Research on two-dimensional (2D) materials has been explosively increasing in last seventeen years in varying subjects including condensed matter physics, electronic engineering, materials science, and chemistry since the mechanical exfoliation of graphene in 2004. Starting from graphene, 2D materials now have become a big family with numerous members and diverse categories. The unique structural features and physicochemical properties of 2D materials make them one class of the most appealing candidates for a wide range of potential applications.In particular, we have seen some major breakthroughs made in the field of 2D materials in last five years not only in developing novel synthetic methods and exploring new structures/properties but also in identifying innovative applications and pushing forward commercialisation. In this review, we provide a critical summary on the recent progress made in the field of 2D materials with a particular focus on last five years. After a brief background 物理化学学报 Acta Phys. -Chim. Sin. 2021, 37 (12), 2108017 (3 of 151) introduction, we first discuss the major synthetic methods for 2D materials, including the mechanical exfoliation, liquid exfoliation, vapor phase deposition, and wet-chemical synthesis as well as phase engineering of 2D materials belonging to the field of phase engineering of nanomaterials (PEN). We then introduce the superconducting/optical/magnetic properties and chirality of 2D materials along with newly emerging magic angle 2D superlattices. Following that, the promising applications of 2D materials in electronics, optoelectronics, catalysis, energy storage, solar cells, biomedicine, sensors, environments, etc. are described sequentially. Thereafter, we present the theoretic calculations and simulations of 2D materials. Finally, after concluding the current progress, we provide some personal discussions on the existing challenges and future outlooks in this rapidly developing field.

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Section: Raman Scatteringmentioning

confidence: 99%

Recent Progress on Two-Dimensional Materials

Chang¹,

Chen²,

Chen³

et al. 2021

Acta Physico Chimica Sinica

310

119

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“…[8] The discovery of 2D van der Waals (vdW) magnetic materials provides an excellent platform for the study of the exchange bias effect. [9,10] Since the intrinsic AFM order in FePS 3 and the FM order in CrGeTe 3 were reported, [11,12] the family of 2D vdW magnetic materials has been rapidly enriched. [13][14][15][16][17][18][19][20] Similar to other 2D vdW materials, the layers in a vdW magnetic material are connected by vdW interaction, which will produce a perfect surface without dangling bonds.…”

Section: Introductionmentioning

confidence: 99%

Tuning the Exchange Bias Effect in 2D van der Waals Ferro‐/Antiferromagnetic Fe₃GeTe₂/CrOCl Heterostructures

Zhang

Huang

et al. 2022

Advanced Science

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The exchange bias effect is extremely expected in 2D van der Waals (vdW) ferromagnetic (FM)/antiferromagnetic (AFM) heterostructures due to the high-quality interface. CrOCl possesses strong magnetic anisotropy at 2D limit, and is an ideal antiferromagnet for constructing FM/AFM heterostructures to explore the exchange bias effect. Here, the exchange bias effect in Fe 3 GeTe 2 (FGT)/CrOCl heterostructures through both anomalous Hall effect (AHE) and reflective magnetic circular dichroism (RMCD) measurements is studied. In the AHE measurements, the exchange bias field (H EB ) at 3 K exhibits a distinct increase from ≈150 Oe to ≈450 Oe after air exposure, and such variation is attributed to the formation of an oxidized layer in FGT by analyzing the cross-sectional microstructure. The H EB is successfully tuned by changing the FGT/CrOCl thickness and the cooling field. Furthermore, a larger H EB of ≈750 Oe at 1.7 K in FGT/CrOCl heterostructure through RMCD measurements is observed, and it is proposed that the larger H EB in RMCD measurements is related to the distribution of uncompensated spins at the interface. This work reveals several intriguing phenomena of the exchange bias effect in 2D vdW magnetic systems, which paves the way for the study of related spintronic devices.

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“…They can be stacked with other vdW materials to rationally create various 2D heterostructures with designed degrees of strain, optical and electrical properties. [1][2][3][4][5][6][7][8][9][10] Moreover, the magnetism of vdW magnets can be effectively controlled by magnetic field, electric field, [11,12] interfacial symmetry, [13] pressure, [14,15] and doping. [16] In order to further miniaturize the device, the fabrication of vdW magnets of only a single or few layers has been long pursuit.…”

Section: Introductionmentioning

confidence: 99%

Ultrathin Van der Waals Antiferromagnet CrTe₃ for Fabrication of In‐Plane CrTe₃/CrTe₂ Monolayer Magnetic Heterostructures

et al. 2022

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Ultrathin van der Waals (vdW) magnets are heavily pursued for potential applications in developing high‐density miniaturized electronic/spintronic devices as well as for topological physics in low‐dimensional structures. Despite the rapid advances in ultrathin ferromagnetic vdW magnets, the antiferromagnetic counterparts, as well as the antiferromagnetic junctions, are much less studied owing to the difficulties in both material fabrication and magnetism characterization. Ultrathin CrTe3 layers have been theoretically proposed to be a vdW antiferromagnetic semiconductor with intrinsic intralayer antiferromagnetism. Herein, the epitaxial growth of monolayer (ML) and bilayer CrTe3 on graphite surface is demonstrated. The structure, electronic and magnetic properties of the ML CrTe3 are characterized by combining scanning tunneling microscopy/spectroscopy and non‐contact atomic force microscopy and confirmed by density functional theory calculations. The CrTe3 MLs can be further utilized for the fabrication of a lateral heterojunction consisting of ML CrTe2 and ML CrTe3 with an atomically sharp and seamless interface. Since ML CrTe2 is a metallic vdW magnet, such a heterostructure presents the first in‐plane magnetic metal–semiconductor heterojunction made of two vdW materials. The successful fabrication of ultrathin antiferromagnetic CrTe3, as well as the magnetic heterojunction, will stimulate the development of miniaturized antiferromagnetic spintronic devices based on vdW materials.

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van der Waals Magnets: Material Family, Detection and Modulation of Magnetism, and Perspective in Spintronics

Cited by 77 publications

References 187 publications

Recent Progress on Two-Dimensional Materials

Recent Progress on Two-Dimensional Materials

Tuning the Exchange Bias Effect in 2D van der Waals Ferro‐/Antiferromagnetic Fe₃GeTe₂/CrOCl Heterostructures

Ultrathin Van der Waals Antiferromagnet CrTe₃ for Fabrication of In‐Plane CrTe₃/CrTe₂ Monolayer Magnetic Heterostructures

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van der Waals Magnets: Material Family, Detection and Modulation of Magnetism, and Perspective in Spintronics

Cited by 77 publications

References 187 publications

Recent Progress on Two-Dimensional Materials

Recent Progress on Two-Dimensional Materials

Tuning the Exchange Bias Effect in 2D van der Waals Ferro‐/Antiferromagnetic Fe3GeTe2/CrOCl Heterostructures

Ultrathin Van der Waals Antiferromagnet CrTe3 for Fabrication of In‐Plane CrTe3/CrTe2 Monolayer Magnetic Heterostructures

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Product

Resources

About

Tuning the Exchange Bias Effect in 2D van der Waals Ferro‐/Antiferromagnetic Fe₃GeTe₂/CrOCl Heterostructures

Ultrathin Van der Waals Antiferromagnet CrTe₃ for Fabrication of In‐Plane CrTe₃/CrTe₂ Monolayer Magnetic Heterostructures