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  • Ferromagnetic properties of...
    Kamal, Zahra; Jamilpanah, Loghman; Zarei Ghobadi, Mohadeseh; Mohseni, Seyed Majid; Ghourchian, Hedayatollah

    Physica. E, Low-dimensional systems & nanostructures, 05/2022, Letnik: 139
    Journal Article

    Long-range magnetic order in graphene has been the subject of study for many researches due to its fundamental and technological prospects. Many theoretical researches have predicted the long-range ferromagnetic exchange in porphyrin-like graphene due to doping the transition metals centers in their structures. However, the experimental observations for such structures, have been rarely reported. In the present work the ferromagnetic properties of iron doped porphyrin-like graphene (Fe–N-Gr) are experimentally considered and the results are reported. At first, the Fe–N-Gr sample is synthesized by mechanochemical mixing of Fe, N, and C sources followed by high temperature pyrolysis treatment. The sample shows the high saturation magnetization of 140 emu/gr at room temperature. Raman, XRD, and XPS results as well as microscopic images revealed that the observed ferromagnetic behavior is induced by doped Fe–N sites in graphene, however the exact microscopic origin cannot be explained and further investigation is needed. These results pave the way for the synthesis of magnetic porphyrin-like graphene with structurally deformed structure. Display omitted •The magnetic properties of Fe/N doped graphene lattice was investigated.•Fe/N doped graphene shows the high saturation magnetization of 140 emu/gr at RT.•The long-range ferromagnetic order in graphene creates ferromagnetic behavior.