Salkazanov A. T.1, Gusev A. S.1, Kaloshin M. M.1, Kosogorova T. A.1, Kukin N. S.1, Nizovtsev A. P.1,2, Kilin S. Ya.1,2, Kargin N. I.1
1National Research Nuclear University “MEPhI”, Moscow, Russia
2B.I.Stepanov Institute of Physics, National Academy of Sciences of Belarus, Minsk, Belarus
Email: ATSalkazanov@mephi.ru, a.nizovtsev@dragon.bas-net.by
A nanosensor for weak magnetic fields based on an individual 14NV-13C complex in diamond has been implemented, where the 13C carbon atom is located in the third coordination shell of the 14NV-center. Using this sensor, the background magnetic field in the laboratory was measured: the projection onto the quantization axis of the complex Bz was approximately 40 μT, which is close to the Earth's magnetic field strength. Comparative modeling of the optically detected magnetic resonance (ODMR) spectra of the 14NV and 14NV-13C systems under various magnetic and electric fields was performed using their respective spin Hamiltonians. It was shown that employing the 14NV-13C complex mitigates the influence of internal crystal fields on the nanomagnetometer. Keywords: Nitrogen-vacancy center, 13C nuclear spin, magnetometry, Kramers degeneracy.
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