Tracking nitrogen-to-nickel ratio and prevalent paramagnetic species in synthetic diamonds by electron spin resonance at 90 K

Osipov, V. Yu.; Shakhov, F. M.; Romanov, N. M.; Takai, Kazuyuki

doi:10.1016/j.mencom.2022.09.026

Cited by 5 publications

(1 citation statement)

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“…The singlet signal from a negatively charged nickel impurity in the substitutional position (S = 3/2, g = 2.0319) is located near the low-field component of the nitrogen triplet and is well resolved [5]. The parameters of the triplet (g = 2.0024) and singlet (g = 2.0319) signals, analyzed by the previously described method of double integration of the EPR spectrum [36], correspond to neutral nitrogen and nickel concentrations of about 140 ppm and 4.3 ppm. Allowed transitions from NV (−) -centers are represented in the powder spectrum by two pairs of symmetrically arranged lines with indices z and x, y for different orientations of the NV-center axis relative to the direction of the magnetic field for the magnetic field ranges H < 313 mT and H > 334 mT.…”

Section: Epr Spectra Under Dark Conditionsmentioning

confidence: 99%

Electron spin resonance of NV-=SUP=-(-)-=/SUP=--centers in synthetic fluorescent diamond microcrystals under conditions of optical spin polarization

Yu.

Bogdanov

Rampersaud

et al. 2022

Optics and Spectroscopy

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Electron paramagnetic resonance (EPR) spectra of synthetic diamond microcrystals with NV(-)-centers have been studied. It is shown that under the conditions of irradiation of the material with the light of a xenon lamp at low temperatures ~ 100 K, the intensities of the EPR signals corresponding to the "forbidden" (Delta ms=2) and low field allowed (Delta ms=1) transitions are amplified several times, while the EPR signals from paramagnetic nitrogen and impurity nickel in the charge state -1 practically do not change. This is due to a change in the population of levels of the ground triplet state of the NV(-)- center and the optical polarization of spins in the state ms=0 of the triplet level. Keywords: nitrogen-vacancy centers, synthetic diamond, electron paramagnetic resonance, spin polarization, luminescence.

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Section: Epr Spectra Under Dark Conditionsmentioning

confidence: 99%