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

Longyu Lu; Qing Wang; Hengli Duan; Kejia Zhu; Tao Hu; Yupeng Ma; Shengchun Shen; Yuran Niu; Jiatu Liu; Jianlin Wang; Sandy Adhitia Ekahana; Jan Dreiser; Y. Soh; Wensheng Yan; Guopeng Wang; Yimin Xiong; Ning Hao; Yalin Lu; Mingliang Tian

doi:10.1021/acs.nanolett.4c00472

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

Longyu Lu, Qing Wang, Hengli Duan, Kejia Zhu, Tao Hu, Yupeng Ma, Shengchun Shen, Yuran Niu, Jiatu Liu, Jianlin Wang, Sandy Adhitia Ekahana, Jan Dreiser, Y. Soh, Wensheng Yan, Guopeng Wang, Yimin Xiong, Ning Hao, Yalin Lu, Mingliang Tian

Research output: Contribution to journal › Letter › peer-review

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 (Fe_0.56Co_0.44)₅GeTe₂ antiferromagnets. Remarkably, the ferromagnetic ordering (≥1 L) and antiferromagnetic ordering (≥4 L) remain discernible up to room temperature. The T_C (∼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.

Original language	English
Pages (from-to)	5984–5992
Number of pages	9
Journal	Nano Letters
Volume	24
Issue number	20
DOIs	https://doi.org/10.1021/acs.nanolett.4c00472
Publication status	Published - 2024

Subject classification (UKÄ)

Condensed Matter Physics

Free keywords

antiferromagnet
ferromagnetism
monolayer
room temperature

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10.1021/acs.nanolett.4c00472

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Lu, L., Wang, Q., Duan, H., Zhu, K., Hu, T., Ma, Y., Shen, S., Niu, Y., Liu, J., Wang, J., Ekahana, S. A., Dreiser, J., Soh, Y., Yan, W., Wang, G., Xiong, Y., Hao, N., Lu, Y., & Tian, M. (2024). Tunable Magnetism in Atomically Thin Itinerant Antiferromagnet with Room-Temperature Ferromagnetic Order. Nano Letters, 24(20), 5984–5992. https://doi.org/10.1021/acs.nanolett.4c00472

@article{0d4eb9f7d81b4992a6090f2aa119ee04,

title = "Tunable Magnetism in Atomically Thin Itinerant Antiferromagnet with Room-Temperature Ferromagnetic Order",

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 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.",

keywords = "antiferromagnet, ferromagnetism, monolayer, room temperature",

author = "Longyu Lu and Qing Wang and Hengli Duan and Kejia Zhu and Tao Hu and Yupeng Ma and Shengchun Shen and Yuran Niu and Jiatu Liu and Jianlin Wang and Ekahana, {Sandy Adhitia} and Jan Dreiser and Y. Soh and Wensheng Yan and Guopeng Wang and Yimin Xiong and Ning Hao and Yalin Lu and Mingliang Tian",

year = "2024",

doi = "10.1021/acs.nanolett.4c00472",

language = "English",

volume = "24",

pages = "5984–5992",

journal = "Nano Letters",

issn = "1530-6984",

publisher = "The American Chemical Society (ACS)",

number = "20",

}

Lu, L, Wang, Q, Duan, H, Zhu, K, Hu, T, Ma, Y, Shen, S, Niu, Y, Liu, J, Wang, J, Ekahana, SA, Dreiser, J, Soh, Y, Yan, W, Wang, G, Xiong, Y, Hao, N, Lu, Y & Tian, M 2024, 'Tunable Magnetism in Atomically Thin Itinerant Antiferromagnet with Room-Temperature Ferromagnetic Order', Nano Letters, vol. 24, no. 20, pp. 5984–5992. https://doi.org/10.1021/acs.nanolett.4c00472

TY - JOUR

T1 - Tunable Magnetism in Atomically Thin Itinerant Antiferromagnet with Room-Temperature Ferromagnetic Order

AU - Lu, Longyu

AU - Wang, Qing

AU - Duan, Hengli

AU - Zhu, Kejia

AU - Hu, Tao

AU - Ma, Yupeng

AU - Shen, Shengchun

AU - Niu, Yuran

AU - Liu, Jiatu

AU - Wang, Jianlin

AU - Ekahana, Sandy Adhitia

AU - Dreiser, Jan

AU - Soh, Y.

AU - Yan, Wensheng

AU - Wang, Guopeng

AU - Xiong, Yimin

AU - Hao, Ning

AU - Lu, Yalin

AU - Tian, Mingliang

PY - 2024

Y1 - 2024

N2 - 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.

AB - 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.

KW - antiferromagnet

KW - ferromagnetism

KW - monolayer

KW - room temperature

U2 - 10.1021/acs.nanolett.4c00472

DO - 10.1021/acs.nanolett.4c00472

M3 - Letter

C2 - 38728101

AN - SCOPUS:85192825021

SN - 1530-6984

VL - 24

SP - 5984

EP - 5992

JO - Nano Letters

JF - Nano Letters

IS - 20

ER -

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

Abstract

Subject classification (UKÄ)

Free keywords

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