Determination of the hyperfine magnetic field in magnetic carbonbased materials: DFT calculations and NMR experiments (CROSBI ID 221436)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Freitas, Jair C. C. ; Scopel, Wanderla L. ; Paz, Wendel S. ; Bernardes, Leandro V. ; Cunha-Filho, Francisco E. ; Speglich, Carlos ; Araújo-Moreira, Fernando M. ; Pelc, Damjan ; Cvitanić, Tonči ; Požek, Miroslav
engleski
Determination of the hyperfine magnetic field in magnetic carbonbased materials: DFT calculations and NMR experiments
The prospect of carbon-based magnetic materials is of immense fundamental and practical importance, and information on atomic-scale features is required for a better understanding of the mechanisms leading to carbon magnetism. Here we report the first direct detection of the microscopic magnetic field produced at 13C nuclei in a ferromagnetic carbon material by zero-field nuclear magnetic resonance (NMR). Electronic structure calculations carried out in nanosized model systems with different classes of structural defects show a similar range of magnetic field values (18–21 T) for all investigated systems, in agreement with the NMR experiments. Our results are strong evidence of the intrinsic nature of defect-induced magnetism in magnetic carbons and establish the magnitude of the hyperfine magnetic field created in the neighbourhood of the defects that lead to magnetic order in these materials.
carbon ; ferromagnetism ; hyperfine field ; NMR
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