We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Determination of the hyperfine magnetic field in magnetic carbonbased materials: DFT calculations and NMR experiments.
- Authors
Freitas, Jair C. C.; Scopel, Wanderlã L.; Paz, Wendel S.; Bernardes, Leandro V.; Cunha-Filho, Francisco E.; Speglich, Carlos; Araújo-Moreira, Fernando M.; Pelc, Damjan; Cvitanić, Tonči; Požek, Miroslav
- Abstract
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.
- Subjects
MAGNETIC fields; FERROMAGNETISM; FERROMAGNETIC materials; DENSITY functional theory; NUCLEAR magnetic resonance
- Publication
Scientific Reports, 2015, p1
- ISSN
2045-2322
- Publication type
Article
- DOI
10.1038/srep14761