Self-Modulated Magnetism in Two-Dimensional Ferromagnet Fe<sub>3</sub>GeTe<sub>2</sub> Induced by Ambient Effects

Zhao, Ruijie; Xu, Weifeng; Wu, Yanfei; Liu, Xinjie; Zhang, Zeyu; Zhu, Mengyuan; Zhang, Liyuan; Shen, Jianxin; Shen, Shipeng; Huang, He; Zhang, Jingyan; Zheng, Xinqi; Wang, Shouguo

doi:10.1021/acsanm.3c03958

ACS Appl. Nano Mater.

2023

DOI: 10.1021/acsanm.3c03958

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Self-Modulated Magnetism in Two-Dimensional Ferromagnet Fe₃GeTe₂ Induced by Ambient Effects

Ruijie Zhao,

Weifeng Xu,

Yanfei Wu

et al.

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2024

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Manipulation of Exchange Bias in Two-Dimensional van der Waals Ferromagnet Near Room Temperature

Liu,

Pei,

Wang

et al. 2024

ACS Nano

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As a host for exchange bias (EB), van der Waals (vdW) magnetic materials have exhibited intriguing and distinct functionalities from conventional magnetic materials. The EB in most vdW systems is far below room temperature, which poses a challenge for practical applications. Here, by using Kerr microscopy, we demonstrate a record-high blocking temperature that approaches room temperature and a huge positive EB field that nears 2 kOe at 100 K in naturally oxidized two-dimensional (2D) vdW ferromagnetic Fe3GaTe2 nanoflakes. Moreover, we realized a reversible manipulation of both the presence/absence and positive/negative signs of EB via a training magnetic field without multiple field cooling processes. Thus, our study clearly reveals the robust, sizable, and sign-tunable EB in vdW magnetic materials up to near room temperature, thereby establishing Fe3GaTe2 as an emerging room-temperature-operating vdW material and paving the way for designing practical 2D spintronic devices.

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Manipulation of Exchange Bias in Two-Dimensional van der Waals Ferromagnet Near Room Temperature

Liu,

Pei,

Wang

et al. 2024

ACS Nano

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Self-Modulated Magnetism in Two-Dimensional Ferromagnet Fe₃GeTe₂ Induced by Ambient Effects

Cited by 1 publication

References 67 publications

Manipulation of Exchange Bias in Two-Dimensional van der Waals Ferromagnet Near Room Temperature

Manipulation of Exchange Bias in Two-Dimensional van der Waals Ferromagnet Near Room Temperature

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Self-Modulated Magnetism in Two-Dimensional Ferromagnet Fe3GeTe2 Induced by Ambient Effects

Cited by 1 publication

References 67 publications

Manipulation of Exchange Bias in Two-Dimensional van der Waals Ferromagnet Near Room Temperature

Manipulation of Exchange Bias in Two-Dimensional van der Waals Ferromagnet Near Room Temperature

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Self-Modulated Magnetism in Two-Dimensional Ferromagnet Fe₃GeTe₂ Induced by Ambient Effects