| Autor: |
von Witte, Gevin, Himmler, Aaron, Tamarov, Konstantin, Moilanen, Jani O., Ernst, Matthias, Kozerke, Sebastian |
| Rok vydání: |
2024 |
| Předmět: |
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| Druh dokumentu: |
Working Paper |
| Popis: |
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. |
| Databáze: |
arXiv |
| Externí odkaz: |
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