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Realizing Room-Temperature Ferromagnetism in Molecular-Intercalated Antiferromagnet VOCl

Liu, Chaocheng ; Li, Zhi ; Chen, Zheng ; Hu, Jiyu ; Duan, Hengli ; Wang, Chao ; Feng, Sihua ; Liu, Ruiqi ; Zhang, Guobin and Cao, Jiefeng , et al. (2024) In Advanced Materials 36(35).
Abstract

2D van der Waals (vdW) magnets are gaining attention in fundamental physics and advanced spintronics, due to their unique dimension-dependent magnetism and potential for ultra-compact integration. However, achieving intrinsic ferromagnetism with high Curie temperature (TC) remains a technical challenge, including preparation and stability issues. Herein, an applicable electrochemical intercalation strategy to decouple interlayer interaction and guide charge doping in antiferromagnet VOCl, thereby inducing robust room-temperature ferromagnetism, is developed. The expanded vdW gap isolates the neighboring layers and shrinks the distance between the V-V bond, favoring the generation of ferromagnetic (FM) coupling with... (More)

2D van der Waals (vdW) magnets are gaining attention in fundamental physics and advanced spintronics, due to their unique dimension-dependent magnetism and potential for ultra-compact integration. However, achieving intrinsic ferromagnetism with high Curie temperature (TC) remains a technical challenge, including preparation and stability issues. Herein, an applicable electrochemical intercalation strategy to decouple interlayer interaction and guide charge doping in antiferromagnet VOCl, thereby inducing robust room-temperature ferromagnetism, is developed. The expanded vdW gap isolates the neighboring layers and shrinks the distance between the V-V bond, favoring the generation of ferromagnetic (FM) coupling with perpendicular magnetic anisotropy. Element-specific X-ray magnetic circular dichroism (XMCD) directly proves the source of the ferromagnetism. Detailed experimental results and density functional theory (DFT) calculations indicate that the charge doping enhances the FM interaction by promoting the orbital hybridization between t2g and eg. This work sheds new light on a promising way to achieve room-temperature ferromagnetism in antiferromagnets, thus addressing the critical materials demand for designing spintronic devices.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
electrochemical intercalation, ferromagnetism modulation, interlayer coupling, orbital hybridization, vdW magnetic materials
in
Advanced Materials
volume
36
issue
35
article number
2405284
publisher
John Wiley & Sons Inc.
external identifiers
  • pmid:38925592
  • scopus:85197790798
ISSN
0935-9648
DOI
10.1002/adma.202405284
language
English
LU publication?
yes
id
47edd759-237b-4d7f-8e60-899b819fea0f
date added to LUP
2024-11-28 14:36:09
date last changed
2025-07-11 09:25:52
@article{47edd759-237b-4d7f-8e60-899b819fea0f,
  abstract     = {{<p>2D van der Waals (vdW) magnets are gaining attention in fundamental physics and advanced spintronics, due to their unique dimension-dependent magnetism and potential for ultra-compact integration. However, achieving intrinsic ferromagnetism with high Curie temperature (T<sub>C</sub>) remains a technical challenge, including preparation and stability issues. Herein, an applicable electrochemical intercalation strategy to decouple interlayer interaction and guide charge doping in antiferromagnet VOCl, thereby inducing robust room-temperature ferromagnetism, is developed. The expanded vdW gap isolates the neighboring layers and shrinks the distance between the V-V bond, favoring the generation of ferromagnetic (FM) coupling with perpendicular magnetic anisotropy. Element-specific X-ray magnetic circular dichroism (XMCD) directly proves the source of the ferromagnetism. Detailed experimental results and density functional theory (DFT) calculations indicate that the charge doping enhances the FM interaction by promoting the orbital hybridization between t<sub>2</sub><sub>g</sub> and e<sub>g</sub>. This work sheds new light on a promising way to achieve room-temperature ferromagnetism in antiferromagnets, thus addressing the critical materials demand for designing spintronic devices.</p>}},
  author       = {{Liu, Chaocheng and Li, Zhi and Chen, Zheng and Hu, Jiyu and Duan, Hengli and Wang, Chao and Feng, Sihua and Liu, Ruiqi and Zhang, Guobin and Cao, Jiefeng and Niu, Yuran and Li, Qian and Li, Pai and Yan, Wensheng}},
  issn         = {{0935-9648}},
  keywords     = {{electrochemical intercalation; ferromagnetism modulation; interlayer coupling; orbital hybridization; vdW magnetic materials}},
  language     = {{eng}},
  number       = {{35}},
  publisher    = {{John Wiley & Sons Inc.}},
  series       = {{Advanced Materials}},
  title        = {{Realizing Room-Temperature Ferromagnetism in Molecular-Intercalated Antiferromagnet VOCl}},
  url          = {{http://dx.doi.org/10.1002/adma.202405284}},
  doi          = {{10.1002/adma.202405284}},
  volume       = {{36}},
  year         = {{2024}},
}