Zhang, Xiaoqian, Lu, Qiangsheng, Liu, Wenqing et al. (14 more authors) (2021) Room-temperature intrinsic ferromagnetism in epitaxial CrTe2 ultrathin films. Nature Communications. 2492. ISSN 2041-1723
Abstract
While the discovery of two-dimensional (2D) magnets opens the door for fundamental physics and next-generation spintronics, it is technically challenging to achieve the room-temperature ferromagnetic (FM) order in a way compatible with potential device applications. Here, we report the growth and properties of single- and few-layer CrTe2, a van der Waals (vdW) material, on bilayer graphene by molecular beam epitaxy (MBE). Intrinsic ferromagnetism with a Curie temperature (TC) up to 300 K, an atomic magnetic moment of ~0.21 [Formula: see text]/Cr and perpendicular magnetic anisotropy (PMA) constant (Ku) of 4.89 × 105 erg/cm3 at room temperature in these few-monolayer films have been unambiguously evidenced by superconducting quantum interference device and X-ray magnetic circular dichroism. This intrinsic ferromagnetism has also been identified by the splitting of majority and minority band dispersions with ~0.2 eV at Г point using angle-resolved photoemission spectroscopy. The FM order is preserved with the film thickness down to a monolayer (TC ~ 200 K), benefiting from the strong PMA and weak interlayer coupling. The successful MBE growth of 2D FM CrTe2 films with room-temperature ferromagnetism opens a new avenue for developing large-scale 2D magnet-based spintronics devices.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © The Author(s) 2021 |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Electronic Engineering (York) |
Depositing User: | Pure (York) |
Date Deposited: | 05 May 2021 15:10 |
Last Modified: | 20 Dec 2024 00:19 |
Published Version: | https://doi.org/10.1038/s41467-021-22777-x |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1038/s41467-021-22777-x |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:173779 |
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Description: CrTe2 thin film paper-final draft
Filename: s41467_021_22777_x.pdf
Description: Room-temperature intrinsic ferromagnetism in epitaxial CrTe2 ultrathin films
Licence: CC-BY 2.5