Abstract
Two types of natural diamonds were investigated by means of PL scanning and ODMR. One was irradiated by neutrons to create NV-centers and the second wasn't specifically treated. The pattern of NV-center distribution was found such that NV-centers in untreated diamond are localized in a special direction, supposedly sliding planes. Furthermore, the spin Hamiltonian parameters E and D of NV-center ground state, calculated by ODMR spectra in untreated diamond, depend on the surface point.
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