High-frequency pulsed ENDOR spectroscopy of the NV− centre in the commercial HPHT diamond

We propose an efficient method for calculating level anti-crossing spectra (LAC spectra) of interacting paramagnetic defect centers in crystals. By LAC spectra we mean the magnetic field dependence of the photoluminescence intensity of paramagnetic color centers: such field dependences often exhibit sharp features, such as peaks or dips, originating from LACs in the spin system. Our approach takes into account the electronic Zeeman interaction with the external magnetic field, dipole-dipole interaction of paramagnetic centers, hyperfine coupling of paramagnetic defects to magnetic nuclei and zero-field splitting. By using this method, we can not only obtain the positions of lines in LAC spectra, but also reproduce their shapes as well as the relative amplitudes of different lines. As a striking example, we present a calculation of LAC spectra in diamond crystals containing negatively charged NV centers.

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“…Hereafter, in calculations we use the following magnetic parameters for the NV − center [47]: g || = 2.0029, g ⊥ = 2.0031,…”

Section: A Lac Spectra Of Different Systemsmentioning

confidence: 99%

A method for simulating level anti-crossing spectra of diamond crystals containing NV− color centers

Anishchik

Ivanov

2019

Journal of Magnetic Resonance

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“…Usually cw and pulse electron paramagnetic (EPR), electron nuclear double (ENDOR), nuclear magnetic (NMR) and optically detected magnetic (ODMR) resonance methods are used to determine the properties of paramagnetic centers and their possible locations in nanodiamonds. [3][4][5][6][7] The application of NV centers as nanoscale sensors of the surrounding environment is an actively developing field of research. Shallow NV centers have recently been applied as atomic-sized NMR sensors 8 that allow the performance of nanoscale NMR with 1 ppm resolution.…”

Section: Introductionmentioning

confidence: 99%

“…10,11 The experimental technique that allows one to determine the actual depth of the NV center deposition inside the nanoparticle is in high demand. 3 He is a premium candidate for studies of the magnetic properties of nanosized samples at low temperatures due to the absence of a nuclear quadrupole moment and sufficiently long intrinsic T 1 relaxation times. Therefore 3 He nuclear magnetic relaxation can be sensitive to the magnetism of the sample.…”

Section: Introductionmentioning

confidence: 99%

“…3 He is a premium candidate for studies of the magnetic properties of nanosized samples at low temperatures due to the absence of a nuclear quadrupole moment and sufficiently long intrinsic T 1 relaxation times. Therefore 3 He nuclear magnetic relaxation can be sensitive to the magnetism of the sample. Properties of adsorbed 3 He are well understood and it is commonly used as a model system of 2D solids with quantum exchange at low temperatures.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore 3 He nuclear magnetic relaxation can be sensitive to the magnetism of the sample. Properties of adsorbed 3 He are well understood and it is commonly used as a model system of 2D solids with quantum exchange at low temperatures. [12][13][14] Usually it is assumed that nuclear magnetic relaxation in this system occurs due to dipole-dipole interactions modulated by quantum exchange or thermal 2D motions.…”

Section: Introductionmentioning

confidence: 99%

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Angstrom-scale probing of paramagnetic centers location in nanodiamonds by ³He NMR at low temperatures

Kuzmin

Safiullin

Dolgorukov

et al. 2018

Phys. Chem. Chem. Phys.

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In this article a method to assess the location of paramagnetic centers in nanodiamonds was proposed. The nuclear magnetic relaxation of adsorbed He used as a probe in this method was studied at temperatures of 1.5-4.2 K and magnetic fields of 100-600 mT. A strong influence of the paramagnetic centers of the sample on theHe nuclear spin relaxation time T was found. Preplating the nanodiamond surface with adsorbed nitrogen layers allowed us to vary the distance from He nuclei to paramagnetic centers in a controlled way and to determine their location using a simple model. The observed T minima in temperature dependences are well described within the frame of the suggested model and consistent with the concentration of paramagnetic centers determined by electron paramagnetic resonance. The average distance found from the paramagnetic centers to the nanodiamond surface (0.5 ± 0.1 nm) confirms the well-known statement that paramagnetic centers in this type of nanodiamond are located in the carbon shell. The proposed method can be applied to detailed studies of nano-materials at low temperatures.

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Ultrahigh nitrogen-vacancy center concentration in diamond

Kollarics

Simón

Bojtor

et al. 2022

Carbon

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High-frequency pulsed ENDOR spectroscopy of the NV− centre in the commercial HPHT diamond

Cited by 21 publications

References 21 publications

A method for simulating level anti-crossing spectra of diamond crystals containing NV− color centers

A method for simulating level anti-crossing spectra of diamond crystals containing NV− color centers

Angstrom-scale probing of paramagnetic centers location in nanodiamonds by ³He NMR at low temperatures

Ultrahigh nitrogen-vacancy center concentration in diamond

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High-frequency pulsed ENDOR spectroscopy of the NV− centre in the commercial HPHT diamond

Cited by 21 publications

References 21 publications

A method for simulating level anti-crossing spectra of diamond crystals containing NV− color centers

A method for simulating level anti-crossing spectra of diamond crystals containing NV− color centers

Angstrom-scale probing of paramagnetic centers location in nanodiamonds by 3He NMR at low temperatures

Ultrahigh nitrogen-vacancy center concentration in diamond

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Product

Resources

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Angstrom-scale probing of paramagnetic centers location in nanodiamonds by ³He NMR at low temperatures