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Tunable Magnetism in Atomically Thin Itinerant Antiferromagnet with Room-Temperature Ferromagnetic Order

Lu, Longyu ; Wang, Qing ; Duan, Hengli ; Zhu, Kejia ; Hu, Tao ; Ma, Yupeng ; Shen, Shengchun ; Niu, Yuran LU ; Liu, Jiatu LU and Wang, Jianlin , et al. (2024) In Nano Letters
Abstract

Addressing the need for modulated spin configurations is crucial, as they serve as the foundational building blocks for next-generation spintronics, particularly in atomically thin structures and at room temperature. In this work, we realize intrinsic ferromagnetism in monolayer flakes and tunable ferro-/antiferromagnetism in (Fe0.56Co0.44)5GeTe2 antiferromagnets. Remarkably, the ferromagnetic ordering (≥1 L) and antiferromagnetic ordering (≥4 L) remain discernible up to room temperature. The TC (∼310 K) of the monolayer flakes sets a record high for known exfoliated monolayer van der Waals magnets. Within the framework of A-type antiferromagnetism, a notable odd-even layer-number... (More)

Addressing the need for modulated spin configurations is crucial, as they serve as the foundational building blocks for next-generation spintronics, particularly in atomically thin structures and at room temperature. In this work, we realize intrinsic ferromagnetism in monolayer flakes and tunable ferro-/antiferromagnetism in (Fe0.56Co0.44)5GeTe2 antiferromagnets. Remarkably, the ferromagnetic ordering (≥1 L) and antiferromagnetic ordering (≥4 L) remain discernible up to room temperature. The TC (∼310 K) of the monolayer flakes sets a record high for known exfoliated monolayer van der Waals magnets. Within the framework of A-type antiferromagnetism, a notable odd-even layer-number effect at elevated temperatures (T = 150 K) is observed. Of particular interest is the strong ferromagnetic order in even-layer flakes at low temperatures. The intricate interplay among magnetic field strength, layer number, and temperature gives rise to a diverse array of phenomena, holding promise not only for new physics but also for practical applications.

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organization
publishing date
type
Contribution to journal
publication status
in press
subject
keywords
antiferromagnet, ferromagnetism, monolayer, room temperature
in
Nano Letters
publisher
The American Chemical Society (ACS)
external identifiers
  • scopus:85192825021
  • pmid:38728101
ISSN
1530-6984
DOI
10.1021/acs.nanolett.4c00472
language
English
LU publication?
yes
id
0d4eb9f7-d81b-4992-a609-0f2aa119ee04
date added to LUP
2024-05-29 15:15:23
date last changed
2024-06-26 17:44:53
@article{0d4eb9f7-d81b-4992-a609-0f2aa119ee04,
  abstract     = {{<p>Addressing the need for modulated spin configurations is crucial, as they serve as the foundational building blocks for next-generation spintronics, particularly in atomically thin structures and at room temperature. In this work, we realize intrinsic ferromagnetism in monolayer flakes and tunable ferro-/antiferromagnetism in (Fe<sub>0.56</sub>Co<sub>0.44</sub>)<sub>5</sub>GeTe<sub>2</sub> antiferromagnets. Remarkably, the ferromagnetic ordering (≥1 L) and antiferromagnetic ordering (≥4 L) remain discernible up to room temperature. The T<sub>C</sub> (∼310 K) of the monolayer flakes sets a record high for known exfoliated monolayer van der Waals magnets. Within the framework of A-type antiferromagnetism, a notable odd-even layer-number effect at elevated temperatures (T = 150 K) is observed. Of particular interest is the strong ferromagnetic order in even-layer flakes at low temperatures. The intricate interplay among magnetic field strength, layer number, and temperature gives rise to a diverse array of phenomena, holding promise not only for new physics but also for practical applications.</p>}},
  author       = {{Lu, Longyu and Wang, Qing and Duan, Hengli and Zhu, Kejia and Hu, Tao and Ma, Yupeng and Shen, Shengchun and Niu, Yuran and Liu, Jiatu and Wang, Jianlin and Ekahana, Sandy Adhitia and Dreiser, Jan and Soh, Y. and Yan, Wensheng and Wang, Guopeng and Xiong, Yimin and Hao, Ning and Lu, Yalin and Tian, Mingliang}},
  issn         = {{1530-6984}},
  keywords     = {{antiferromagnet; ferromagnetism; monolayer; room temperature}},
  language     = {{eng}},
  publisher    = {{The American Chemical Society (ACS)}},
  series       = {{Nano Letters}},
  title        = {{Tunable Magnetism in Atomically Thin Itinerant Antiferromagnet with Room-Temperature Ferromagnetic Order}},
  url          = {{http://dx.doi.org/10.1021/acs.nanolett.4c00472}},
  doi          = {{10.1021/acs.nanolett.4c00472}},
  year         = {{2024}},
}