Efficient conversion of nitrogen to nitrogen-vacancy centers in diamond particles with high-temperature electron irradiation

Mindarava, Yuliya; Blinder, Rémi; Laube, Christian; Knolle, Wolfgang; Abel, Bernd; Jentgens, Christian; Isoya, Junichi; Scheuer, Jochen; Lang, Johannes; Schwartz, Ilai; Naydenov, Boris; Jelezko, Fedor

doi:10.1016/j.carbon.2020.07.077

Cited by 35 publications

(71 citation statements)

References 37 publications

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“…While ODMR studies of the spin relaxation times were done extensively with a various concentrations of NV − ensembles, EPR investigations has been less explored due to the limited sensitivity of the measurement [34][35][36][37]. Knowledge of T 1 is crucial for the sensor applications as well as it defines the longest timescale over which a quantum information may be stored.…”

Section: Resultsmentioning

confidence: 99%

Ultrahigh nitrogen-vacancy center concentration in diamond

Kollarics,

Simon,

Bojtor

et al. 2021

Preprint

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High concentration of negatively charged nitrogen-vacancy (NV − ) centers was created in diamond single crystals containing approximately 100 ppm nitrogen using electron and neutron irradiation and subsequent thermal annealing in a stepwise manner. Continuous wave electron paramagnetic resonance (EPR) was used to determine the transformation efficiency from isolated N atoms to NV − centers in each production step and its highest value was as high as 17.5 %. Charged vacancies are formed after electron irradiation as shown by EPR spectra, but the thermal annealing restores the sample quality as the defect signal diminishes. We find that about 25 % of the vacancies form NVs during the annealing process. The large NV − concentration allows to observe orientation dependent spin-relaxation times and also the determination of the hyperfine

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Section: Resultsmentioning

confidence: 99%

Ultrahigh nitrogen-vacancy center concentration in diamond

Kollarics,

Simon,

Bojtor

et al. 2021

Preprint

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“…One of them investigated the effects of electron irradiation on in situ heated nanoparticles of diamond. [ 41 ] These samples were irradiated with the same accelerator as our crystals. In the study by Capelli et al, [ 39 ] the authors increased the NV‐center concentration through electron irradiation maintaining the bulk diamonds at high temperatures.…”

Section: Methodsmentioning

confidence: 99%

Weak Electron Irradiation Suppresses the Anomalous Magnetization of N‐Doped Diamond Crystals

Setzer

Esquinazi

Daikos

et al. 2021

Physica Status Solidi (b)

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“…There are two recent works directly related to our studies. One of them investigated the effects of electron irradiation on in-situ heated nano-particles of diamond [41]. These samples were irradiated with the same accelerator as our crystals.…”

Section: B Electron Irradiationmentioning

confidence: 99%

Weak electron irradiation suppresses the anomalous magnetization of N-doped diamond crystals

Setzer,

Esquinazi,

Daikos

et al. 2021

Preprint

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Several diamond bulk crystals with a concentration of electrically neutral single substitutional nitrogen atoms of 80 ppm, the so-called C-or P1-centres, were irradiated with electrons at 10 MeV energy and low fluence. The results show a complete suppression of the irreversible behavior in field and temperature of the magnetization below ∼ 30 K, after a decrease of 40 ppm in the concentration of C-centres produced by the electron irradiation. This result indicates that magnetic C-centres are at the origin of the large hysteretic behavior found recently in nitrogen-doped diamond crystals. This is remarkable because of the relatively low density of C-centres, stressing the extraordinary role of the C-centres in triggering those phenomena in diamond at relatively high temperatures. After annealing the samples at high temperatures in vacuum, the hysteretic behavior is partially recovered.

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Efficient conversion of nitrogen to nitrogen-vacancy centers in diamond particles with high-temperature electron irradiation

Cited by 35 publications

References 37 publications

Ultrahigh nitrogen-vacancy center concentration in diamond

Ultrahigh nitrogen-vacancy center concentration in diamond

Weak Electron Irradiation Suppresses the Anomalous Magnetization of N‐Doped Diamond Crystals

Weak electron irradiation suppresses the anomalous magnetization of N-doped diamond crystals

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