Naslov
Determination of the hyperfine magnetic field in magnetic carbonbased materials: DFT calculations and NMR experiments

Autori
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

Izvornik
Scientific reports (2045-2322) 5 (2015); 14761-1

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
carbon ; ferromagnetism ; hyperfine field ; NMR

Sažetak
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.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA