EPR study of the transformations in nickel containing centres at heated synthetic diamonds

Nadolinny, V. A.; Yelisseyev, A.; Yuryeva, O. P.; Feygelson, B. N.

doi:10.1007/bf03164134

Cited by 62 publications

(50 citation statements)

References 9 publications

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“…However, the satellites around the lines of the P1 EPR spectrum in the contribution by Ref. [27] can be related to 13 C HFS of distant carbon atoms. Also these satellites cannot be interpreted by the presence of separated pairs of nitrogen, because the other vibration band 1344 cm À1 corresponding to substitutional nitrogen does not change its position.…”

Section: Epr and Luminescence Spectra Of Diamond Crystals After Hthp mentioning

confidence: 96%

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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Section: Epr and Luminescence Spectra Of Diamond Crystals After Hthp mentioning

confidence: 96%

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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“…2). The simplest of them, NE1 [14] and NES [15], appear at the second step of annealing and have two nitrogen atoms in different positions in the first sphere around the double semi-vacancy. Next, increasing the annealing temperature produces more complicated nickel-nitrogen centers with three (NE2, NE3) [14] and four (NE8) nitrogen atoms [16].…”

Section: Nickel-containing Centers In Diamondsmentioning

confidence: 99%

EPR study of the peculiarities of incorporating transition metal ions into the diamond structure

Nadolinny

Baker²,

Yuryeva

et al. 2005

Appl. Magn. Reson.

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Abstraet.In this paper previously obtained data is reviewed and new data is discussed about nickelcontaining centers in diamonds. These data ate used to suggest interpretation of new data about cobalt-containing centers and to understand the influence of iron on the defects in diamonds grown in the iron system. A newly discovered nickel-nitrogen center has three nitrogen atoms in the first neighbor sphere around the double semi-vacancy and looks like the N3 (P2) center. In diamonds grown in the cobalt system two new types of cobalt-containing centers were found (NLO2 and NWO1). Both centers have electron spin S = 1/2 and hyperfine structure from one cobalt ion (I = 7/2 with natural abun:ldnce 100%). A case can be made fora double semi-vacancy structure for these defects. Special"~i-owth of diamond in the system enriched in tSN decreased the line width down to 0.6 G, but gave no direct evidence of the existence of nitrogen in the defeet structure. Asymmetrical shapes of the hnes in the electron paramagnetic resonance (EPR) spectra of cobalt-containing centers with opposite signs in low and high magnetic field parts of spectra are due to very sensitive spin-Hamiltonian parameters of these defects to the lattice distortions. Annealing of cobalt-containing crystals at 2600 K produces the disappearance of all cobalt-containing EPR spectra, probably due to the capture of an additional nitrogen atom and the creation of a 3d 6 diamagnetic state. In diamonds grown in the iron system with a high content of nitrogen there is evidence of an influence of ferromagnetic inclusion on the exchange interaction between substitutional nitrogen as an additional channel of indirect exchange interaction. lntroductionThe development of the technology of both synthesis and annealing of diamond crystals allows the study of a means of successively incorporating impurity ions into the diamond structure. Progress in understanding the formation of nitrogen defects created in diamonds began with the seminal papers of Chrenko et al. [1]

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“…It should be mentioned that only few of the São-Luis samples exhibited weak S2 and S3 PL centers containing nickel ions in their structure (Nadolinny et al 1997(Nadolinny et al , 1999. The S2 and S3 systems were typically observed in diamond crystals of the peridotitic paragenesis (olivine being statistically determined in the inclusions from these crystals) (Nadolinny et al 1995).…”

Section: N3 H3 H4 and 4907 Nm Centersmentioning

confidence: 96%

“…Weak ZPLs at 498.3, 505, 496.7, and 523.2 nm were detected in a few cases (Tables 1, 2). The latter two lines, documented in only five samples, can be assigned to the nickel-related S3 (NE1 EPR) and 523 (NE3 EPR) centers (Nadolinny et al 1997(Nadolinny et al , 1999.…”

Section: Photoluminescence Spectra Of Superdeep Diamond Crystals 313 mentioning

confidence: 97%

The characteristic photoluminescence and EPR features of superdeep diamonds (São-Luis, Brazil)

et al. 2015

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EPR study of the transformations in nickel containing centres at heated synthetic diamonds

Cited by 62 publications

References 9 publications

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

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

EPR study of the peculiarities of incorporating transition metal ions into the diamond structure

The characteristic photoluminescence and EPR features of superdeep diamonds (São-Luis, Brazil)

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