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Embedding atomic cobalt into graphene lattices to activate room-temperature ferromagnetism

Author

Listed:
  • Wei Hu

    (National Synchrotron Radiation Laboratory, University of Science and Technology of China)

  • Chao Wang

    (National Synchrotron Radiation Laboratory, University of Science and Technology of China)

  • Hao Tan

    (National Synchrotron Radiation Laboratory, University of Science and Technology of China)

  • Hengli Duan

    (National Synchrotron Radiation Laboratory, University of Science and Technology of China)

  • Guinan Li

    (National Synchrotron Radiation Laboratory, University of Science and Technology of China)

  • Na Li

    (National Synchrotron Radiation Laboratory, University of Science and Technology of China)

  • Qianqian Ji

    (National Synchrotron Radiation Laboratory, University of Science and Technology of China)

  • Ying Lu

    (National Synchrotron Radiation Laboratory, University of Science and Technology of China)

  • Yao Wang

    (National Synchrotron Radiation Laboratory, University of Science and Technology of China)

  • Zhihu Sun

    (National Synchrotron Radiation Laboratory, University of Science and Technology of China)

  • Fengchun Hu

    (National Synchrotron Radiation Laboratory, University of Science and Technology of China)

  • Wensheng Yan

    (National Synchrotron Radiation Laboratory, University of Science and Technology of China)

Abstract

Graphene is extremely promising for next-generation spintronics applications; however, realizing graphene-based room-temperature magnets remains a great challenge. Here, we demonstrate that robust room-temperature ferromagnetism with TC up to ∼400 K and saturation magnetization of 0.11 emu g−1 (300 K) can be achieved in graphene by embedding isolated Co atoms with the aid of coordinated N atoms. Extensive structural characterizations show that square-planar Co-N4 moieties were formed in the graphene lattices, where atomically dispersed Co atoms provide local magnetic moments. Detailed electronic structure calculations reveal that the hybridization between the d electrons of Co atoms and delocalized pz electrons of N/C atoms enhances the conduction-electron mediated long-range magnetic coupling. This work provides an effective means to induce room-temperature ferromagnetism in graphene and may open possibilities for developing graphene-based spintronics devices.

Suggested Citation

  • Wei Hu & Chao Wang & Hao Tan & Hengli Duan & Guinan Li & Na Li & Qianqian Ji & Ying Lu & Yao Wang & Zhihu Sun & Fengchun Hu & Wensheng Yan, 2021. "Embedding atomic cobalt into graphene lattices to activate room-temperature ferromagnetism," Nature Communications, Nature, vol. 12(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-22122-2
    DOI: 10.1038/s41467-021-22122-2
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    Cited by:

    1. Mengtao Tian & Yi Liu & Shaoze Zhang & Can Yu & Kostya (Ken) Ostrikov & Zhenghua Zhang, 2024. "Overcoming the permeability-selectivity challenge in water purification using two-dimensional cobalt-functionalized vermiculite membrane," Nature Communications, Nature, vol. 15(1), pages 1-10, December.
    2. Yangyang Liu & Can Li & Chunhui Tan & Zengxia Pei & Tao Yang & Shuzhen Zhang & Qianwei Huang & Yihan Wang & Zheng Zhou & Xiaozhou Liao & Juncai Dong & Hao Tan & Wensheng Yan & Huajie Yin & Zhao-Qing L, 2023. "Electrosynthesis of chlorine from seawater-like solution through single-atom catalysts," Nature Communications, Nature, vol. 14(1), pages 1-13, December.

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