Realizing room-temperature ferromagnetism in metal-free graphene through vacancy-assisted hydrogenation AITranslate

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DOI：10.23919/CHAIN.2025.000001

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Room-temperature ferromagnetism in graphene is a crucial step toward the practical application of spintronic devices. While hydrogen adsorption on graphene has been shown to induce magnetic moments, the overall efficiency remains low due to the clustering of hydrogen atoms and weak magnetic coupling. This study demonstrates a highly effective vacancy-assisted hydrogenation method to synthesize hydrogenated graphene (HG) with robust room-temperature ferromagnetism. The introduction of vacancies inhibits hydrogen clustering, increases magnetic edge atoms, and enhances the coupling between magnetic moments. As a result, HG exhibits a Curie temperature of 540 K and a saturation magnetization of 0.69 emu/g at 300 K. Our findings provide a new approach for the efficient hydrogenation of graphene, paving the way for its applications in spintronic devices.