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원자제어 저차원 전자계 연구단
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Large-Area Epitaxial Film Growth of van der Waals Ferromagnetic Ternary Chalcogenides

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Title
Large-Area Epitaxial Film Growth of van der Waals Ferromagnetic Ternary Chalcogenides
Author(s)
Giri, Anupam; Chandan De; Kumar, Manish; Pal, Monalisa; Lee, Hyun Hwi; Jun Sung Kim; Cheong, Sang-Wook; Jeong, Unyong
Publication Date
2021-11
Journal
Advanced Materials, v.33, no.45
Publisher
John Wiley and Sons Inc
Abstract
© 2021 Wiley-VCH GmbHFollowing the first experimental realization of intrinsic ferromagnetism in 2D van der Waals (vdW) crystals, several ternary metal chalcogenides with unprecedented long-range ferromagnetic order have been explored. However, the synthesis of large-area 2D ternary metal chalcogenide thin films is a great challenge, and a generalized synthesis has not been demonstrated yet. Here, a quick and scalable synthesis of epitaxially aligned ferromagnetic ternary metal chalcogenide thin films (Cr2Ge2Te6, Cr2Si2Te6, Mn3Si2Te6) is reported. The synthesis is based on the flux-controlled surface diffusion of Te on metal (Cr, Mn)-deposited wafer (Ge, Si) substrates. Magnetic anisotropy study of the epitaxial ternary thin films reveals the intrinsic magnetic easy axis; out-of-plane direction for Cr2Ge2Te6 and Cr2Si2Te6, and in-plane direction for Mn3Si2Te6. In addition to the synthesis, this work creates an opportunity for transfer-free device fabrication for realizing magnetoelectronics based on the electrical control of both charge and spin degrees of freedom in 2D ferromagnetic semiconductors.
URI
https://pr.ibs.re.kr/handle/8788114/10744
DOI
10.1002/adma.202103609
ISSN
0935-9648
Appears in Collections:
Center for Artificial Low Dimensional Electronic Systems(원자제어 저차원 전자계 연구단) > 1. Journal Papers (저널논문)
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