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Strong intrinsic room-temperature ferromagnetism in freestanding non-van der Waals ultrathin 2D crystals

Author

Listed:
  • Hao Wu

    (Huazhong University of Science and Technology (HUST))

  • Wenfeng Zhang

    (Huazhong University of Science and Technology (HUST))

  • Li Yang

    (Huazhong University of Science and Technology (HUST))

  • Jun Wang

    (China Jiliang University)

  • Jie Li

    (Huazhong University of Science and Technology (HUST))

  • Luying Li

    (Huazhong University of Science and Technology)

  • Yihua Gao

    (Huazhong University of Science and Technology
    Huazhong University of Science and Technology)

  • Liang Zhang

    (Guangxi University of Science and Technology)

  • Juan Du

    (Ningbo Institute of Material Technology & Engineering, Chinese Academy of Sciences
    Institute of Materials, Shanghai University)

  • Haibo Shu

    (China Jiliang University)

  • Haixin Chang

    (Huazhong University of Science and Technology (HUST)
    Guangxi University of Science and Technology
    Institute for Quantum Science and Engineering, Huazhong University of Science and Technology)

Abstract

Control of ferromagnetism is of critical importance for a variety of proposed spintronic and topological quantum technologies. Inducing long-range ferromagnetic order in ultrathin 2D crystals will provide more functional possibility to combine their unique electronic, optical and mechanical properties to develop new multifunctional coupled applications. Recently discovered intrinsic 2D ferromagnetic crystals such as Cr2Ge2Te6, CrI3 and Fe3GeTe2 are intrinsically ferromagnetic only below room temperature, mostly far below room temperature (Curie temperature, ~20–207 K). Here we develop a scalable method to prepare freestanding non-van der Waals ultrathin 2D crystals down to mono- and few unit cells (UC) and report unexpected strong, intrinsic, ambient-air-robust, room-temperature ferromagnetism with TC up to ~367 K in freestanding non-van der Waals 2D CrTe crystals. Freestanding 2D CrTe crystals show comparable or better ferromagnetic properties to widely-used Fe, Co, Ni and BaFe12O19, promising as new platforms for room-temperature intrinsically-ferromagnetic 2D crystals and integrated 2D devices.

Suggested Citation

  • Hao Wu & Wenfeng Zhang & Li Yang & Jun Wang & Jie Li & Luying Li & Yihua Gao & Liang Zhang & Juan Du & Haibo Shu & Haixin Chang, 2021. "Strong intrinsic room-temperature ferromagnetism in freestanding non-van der Waals ultrathin 2D crystals," Nature Communications, Nature, vol. 12(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-26009-0
    DOI: 10.1038/s41467-021-26009-0
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    Cited by:

    1. Zijing Zhao & Zhi Fang & Xiaocang Han & Shiqi Yang & Cong Zhou & Yi Zeng & Biao Zhang & Wei Li & Zhan Wang & Ying Zhang & Jian Zhou & Jiadong Zhou & Yu Ye & Xinmei Hou & Xiaoxu Zhao & Song Gao & Yangl, 2023. "A general thermodynamics-triggered competitive growth model to guide the synthesis of two-dimensional nonlayered materials," Nature Communications, Nature, vol. 14(1), pages 1-11, December.
    2. Ruiqing Cheng & Lei Yin & Yao Wen & Baoxing Zhai & Yuzheng Guo & Zhaofu Zhang & Weitu Liao & Wenqi Xiong & Hao Wang & Shengjun Yuan & Jian Jiang & Chuansheng Liu & Jun He, 2022. "Ultrathin ferrite nanosheets for room-temperature two-dimensional magnetic semiconductors," Nature Communications, Nature, vol. 13(1), pages 1-9, December.

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