Hyperfine magnetic field in ferromagnetic graphite
Information on atomic-scale features is required for a better understanding of the mechanisms leading to magnetism in non-metallic, carbon-based materials. This work reports a direct evaluation of the hyperfine magnetic field produced at 13C nuclei in ferromagnetic graphite by nuclear magnetic reson...
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| creator | 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 |
| description | Information on atomic-scale features is required for a better understanding of the mechanisms leading to magnetism in non-metallic, carbon-based materials. This work reports a direct evaluation of the hyperfine magnetic field produced at 13C nuclei in ferromagnetic graphite by nuclear magnetic resonance (NMR). The experimental investigation was made possible by the results of first-principles calculations carried out in model systems, including graphene sheets with atomic vacancies and graphite nanoribbons with edge sites partially passivated by oxygen. A similar range of maximum hyperfine magnetic field values (18-21T) was found for all systems, setting the frequency span to be investigated in the NMR experiments; accordingly, a significant 13C NMR signal was detected close to this range without any external applied magnetic field in ferromagnetic graphite. |
| doi_str_mv | 10.48550/arxiv.1406.1119 |
| format | Article |
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This work reports a direct evaluation of the hyperfine magnetic field produced at 13C nuclei in ferromagnetic graphite by nuclear magnetic resonance (NMR). The experimental investigation was made possible by the results of first-principles calculations carried out in model systems, including graphene sheets with atomic vacancies and graphite nanoribbons with edge sites partially passivated by oxygen. 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| source | Freely Accessible Journals; arXiv.org |
| subjects | Carbon 13 Ferromagnetic resonance Ferromagnetism First principles Graphene Graphite Magnetic fields Magnetism NMR Nuclear magnetic resonance Physics - Materials Science |
| title | Hyperfine magnetic field in ferromagnetic graphite |
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