Distribution of OK1, N3 and NU1 defects in diamond crystals of different habits

Nadolinny, V. A.; Yuryeva, O. P.; Рахманова, М. И.; Shatsky, V. S.; Palyanov, Yuri N.; Kupriyanov, Igor N.; Zedgenizov, D. A.; Ragozin, A. L.

doi:10.1127/0935-1221/2012/0024-2173

Cited by 20 publications

(33 citation statements)

References 11 publications

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“…The N3/440.3 nm center was observed in the photoluminescence spectra of the samples [36]. The analysis of the phonon structure of the N3/440.3 nm center showed that the energy of the quasi-local vibration (53 meV) corresponded to the titanium atom mass [33]. Annealing of natural diamond crystals at 2500 K for two hours showed that the N3 paramagnetic center transformed into OK1 paramagnetic centers [37].…”

Section: Titanium-containing Centers In Diamondmentioning

confidence: 98%

“…However, the oxygen HFS could not be detected in the EPR spectra, since 17 O (I = 5/2, natural abundance 0.038%) is the only stable isotope with a magnetic nucleus. The finding of Novosibirsk geologists of the eclogite sample, with diamonds containing N3 and OK1 centers, stimulated new efforts in the investigation of N3 and OK1 centers [32,33]. The statistics shows that the concentration of OK1 and N3 centers inversely depends on the nitrogen concentration.…”

Section: Titanium-containing Centers In Diamondmentioning

confidence: 99%

“…Both centers have electron spin S = 1/2, and the HFS of one nitrogen atom (Table 3) [32,33]. In the photoluminescence spectra, the OK1 paramagnetic centers correspond to the S1 system (zero-phonon lines at 503.4 nm and 510.7 nm); the N3 center has a zero-phonon line at 440.3 nm.…”

Section: Titanium-containing Centers In Diamondmentioning

confidence: 99%

“…g 1 (A 1 ) corresponds to (1)(2)(3)(4)(5)(6)(7)(8)(9)(10), α is the angle between g 2 (A 2 ) and (110). γ is the angle between A 1 and (1-1-1) or (-11-1) that rotates towards (1-10), A 2 is perpendicular to the (110) plane [32,33]. A detailed analysis of the N3 EPR spectrum allowed the authors to assume that the N3 center had the structure of a Ti-N pair at the neighboring carbon sites (Figure 3) [32,33].…”

Section: Titanium-containing Centers In Diamondmentioning

confidence: 99%

“…γ is the angle between A 1 and (1-1-1) or (-11-1) that rotates towards (1-10), A 2 is perpendicular to the (110) plane [32,33]. A detailed analysis of the N3 EPR spectrum allowed the authors to assume that the N3 center had the structure of a Ti-N pair at the neighboring carbon sites (Figure 3) [32,33]. The Ti-C bond lengths (~2 Å) are considerably longer than the C-C bond in diamond (1.54 Å), which results in internal strain around the defect.…”

Section: Titanium-containing Centers In Diamondmentioning

confidence: 99%

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Incorporation of Large Impurity Atoms into the Diamond Crystal Lattice: EPR of Split-Vacancy Defects in Diamond

2017

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Diamond is a unique mineral widely used in diverse fields due to its remarkable properties. The development of synthesis technology made it possible to create diamond-based semiconductor devices. In addition, doped diamond can be used as single photon emitters in various luminescence applications. Different properties are the result of the presence of impurities or intrinsic defects in diamond. Thus, the investigation of the defect formation process is of particular interest. Although hydrogen, nitrogen, and boron have been known to form different point defects, the possibility for large impurity atoms to incorporate into the diamond crystal structure has been questioned for a long time. In the current paper, the paramagnetic nickel split-vacancy defect in diamond is described, and the further investigation of nickel-, cobalt-, titanium-, phosphorus-, silicon-, and germanium-related defects is discussed.

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Section: Titanium-containing Centers In Diamondmentioning

confidence: 98%

Section: Titanium-containing Centers In Diamondmentioning

confidence: 99%

Section: Titanium-containing Centers In Diamondmentioning

confidence: 99%

Section: Titanium-containing Centers In Diamondmentioning

confidence: 99%

Section: Titanium-containing Centers In Diamondmentioning

confidence: 99%

See 3 more Smart Citations

Incorporation of Large Impurity Atoms into the Diamond Crystal Lattice: EPR of Split-Vacancy Defects in Diamond

2017

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EPR study of impurity defects in diamonds grown in carbonate medium

Komarovskikh

Nadolinny

Palyanov

et al. 2013

Physica Status Solidi (a)

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Three previously unobserved paramagnetic centers: OX1, OX2, and OX3, have been revealed by the EPR studies of synthetic diamonds grown in Na2CO3–CO2–C system. All of these centers have electron spin S = 1/2 and have not got hyperfine structure. High g‐factor anisotropy of the studied OX1, OX2, and OX3 centers in the absence of transition metal ions in diamond structure may be indicative that there is an oxygen atom in the structure of these defects. IR spectra of the studied diamonds contain intensive line at 1332 cm−1, which confirms high content of positive charge state of substitutional nitrogen (N+) in studied diamonds. It was supposed that all of these three centers have negative charge states. In the paper structures of OX1, OX2, and OX3 centers are discussed according to the obtained experimental data.

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The influence of HTHP treatment on the OK1 and N3 centers in natural diamond crystals

Nadolinny

Palyanov

Yuryeva

et al. 2015

Physica Status Solidi (a)

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The structures of nitrogen-containing paramagnetic centers OK1 and N3 have not been unambiguously determined yet. In this paper, we will present data on the influence of high temperature annealing on the paramagnetic centers OK1 and N3 in diamond. A series of natural colored diamond crystals of cubic habit containing paramagnetic centers OK1 and N3 was studied by electron paramagnetic resonance (EPR), luminescence, and IR spectroscopies. It was found that annealing at temperatures above 2470 K led to the transformation of N3 paramagnetic centers into OK1 paramagnetic centers. Previous work has showed that a temperature in excess of 2400 K are often associated with a local environment change of tetrahedral to octahedral for impurities with large atomic radii. We report a correlation with the intensity of the optical 635.7 nm system and the concentration of the N3 EPR center. However, on stepped annealing 635.7 nm was removed before the N3 EPR center. From the analysis presented, we propose that the N3 EPR center and the 635.7 nm optical system are the manifestation of various defects formed by one impurity atom. 1 Introduction Although the nitrogen-containing paramagnetic centers OK1 and N3 [1, 2] were first detected more than 30 years ago, the identity of these centers was not been unambiguously determined [2][3][4][5]. Regarding the nature of defects in diamond, more than 500 have been characterized with only a handful identified. Of those positively identified, EPR was often a key tool used in unlocking their structure and identity. This includes nitrogen centers P1 [6], P2 [7,8], W7 formed by the interaction of Acenters with the dislocation [9,10], and N 2 V which is the result of the interaction of A-centers with vacancies [10]. In addition, the structures of nickel-nitrogen centers NE1-NE9 [11][12][13][14], boron-nickel centers [15], nitrogen-cobalt centers [16,17], nitrogen-phosphorus centers NP1-NP7 [18][19][20], oxygen-containing [21], and hydrogen-containing centers [22,23] were determined. OK1 and N3 EPR centers remain unidentified but are often observed together, as shown by recent studies [23]. They are a characteristic

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Distribution of OK1, N3 and NU1 defects in diamond crystals of different habits

Cited by 20 publications

References 11 publications

Incorporation of Large Impurity Atoms into the Diamond Crystal Lattice: EPR of Split-Vacancy Defects in Diamond

Incorporation of Large Impurity Atoms into the Diamond Crystal Lattice: EPR of Split-Vacancy Defects in Diamond

EPR study of impurity defects in diamonds grown in carbonate medium

The influence of HTHP treatment on the OK1 and N3 centers in natural diamond crystals

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