Temperature-dependent dynamic nuclear polarization of diamond
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arXiv
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| Autores principales: | , , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866910749216997376 |
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| author | von Witte, Gevin Himmler, Aaron Tamarov, Konstantin Moilanen, Jani O. Ernst, Matthias Kozerke, Sebastian |
| author_facet | von Witte, Gevin Himmler, Aaron Tamarov, Konstantin Moilanen, Jani O. Ernst, Matthias Kozerke, Sebastian |
| contents | Dynamic nuclear polarization (DNP) can increase nuclear magnetic resonance (NMR) signals by orders of magnitude. DNP in diamond proceeds through different DNP mechanisms with a possible temperature-dependence. We report on 13C dynamic nuclear polarization (DNP) experiments in diamonds at 3.4 T and 7 T between 300 K and 1.7 K. Nuclear polarization enhancements between 100 and 600 were measured for all temperatures, corresponding to polarizations at 7 T between 0.1% (300 K) and 38% (1.7 K). A strong temperature dependence of the DNP profiles was observed. Longitudinal-detected (LOD) electron paramagnetic resonance (EPR) experiments revealed an additional broad temperature-dependent electron line centered around the mI = 0 line of the P1 triplet transitions. Our results suggest that nuclei are preferentially polarized via a direct hyperfine mediated polarization transfer while spin diffusion in the sample plays a minor role. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_12663 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Temperature-dependent dynamic nuclear polarization of diamond von Witte, Gevin Himmler, Aaron Tamarov, Konstantin Moilanen, Jani O. Ernst, Matthias Kozerke, Sebastian Materials Science Chemical Physics Dynamic nuclear polarization (DNP) can increase nuclear magnetic resonance (NMR) signals by orders of magnitude. DNP in diamond proceeds through different DNP mechanisms with a possible temperature-dependence. We report on 13C dynamic nuclear polarization (DNP) experiments in diamonds at 3.4 T and 7 T between 300 K and 1.7 K. Nuclear polarization enhancements between 100 and 600 were measured for all temperatures, corresponding to polarizations at 7 T between 0.1% (300 K) and 38% (1.7 K). A strong temperature dependence of the DNP profiles was observed. Longitudinal-detected (LOD) electron paramagnetic resonance (EPR) experiments revealed an additional broad temperature-dependent electron line centered around the mI = 0 line of the P1 triplet transitions. Our results suggest that nuclei are preferentially polarized via a direct hyperfine mediated polarization transfer while spin diffusion in the sample plays a minor role. |
| title | Temperature-dependent dynamic nuclear polarization of diamond |
| topic | Materials Science Chemical Physics |
| url | https://arxiv.org/abs/2412.12663 |