Инд. авторы:	Nadolinnyi V.A., Komarovskikh A.Y., Pal'yanov Y.N., Kupriyanov I.N.
Заглавие:	EPR OF NEW PHOSPHORUS-CONTAINING CENTERS IN SYNTHETIC DIAMONDS
Библ. ссылка:	Nadolinnyi V.A., Komarovskikh A.Y., Pal'yanov Y.N., Kupriyanov I.N. EPR OF NEW PHOSPHORUS-CONTAINING CENTERS IN SYNTHETIC DIAMONDS // Journal of Structural Chemistry. - 2013. - Vol.54. - P.S86-S91. - ISSN 0022-4766. - EISSN 1573-8779.
Внешние системы:	DOI: 10.1134/S0022476613070068; SCOPUS: 2-s2.0-84902482958; WoS: 000325621000006;
Реферат:	eng: The effect is studied of electron and X-ray irradiation on phosphorous centers in synthetic diamonds grown in the P-C medium by the Bars technology. After exposure to X-ray irradiation, a new paramagnetic phosphorus-containing center NP6, in addition to the phosphorous centers NP4 and NP5, is observed in diamonds annealed at a temperature of 2300 degrees C and pressure of 7.5 GPa. The spectrum of NP6 is simulated to give the following parameters: A(1) = 29.42 G, A(2) = 23.28 G, A(3) = 75.85 G, g(1) = 2.00085, g(2) = 2.00083, and g(3) = 2.00083. The NP4-NP6 centers are assumed to be genetically related to the three nitrogen-phosphorous centers NP1-NP3 and be formed as a result of the transformation of the tetrahedral environment around the phosphorous atom into an octahedral environment at an annealing temperature of 2300 degrees C. The synthetic diamonds annealed at 2300 degrees C were successively exposed to irradiation with electrons with energies of 3.5 MeV (5x10(17) e/cm(2)) and annealing at temperatures of 500 degrees C and 700 degrees C. The EPR method is used to find that annealing of the electron-irradiated crystals at 700 degrees C leads to the formation of a new paramagnetic center with spin S = 1 and hyperfine structure (HFS) from one phosphorus atom with the parameters: g = 2.0012, D = 19.7 G, and A(P) = 3.6 G. The center is likely to have an eight-vacancy chain structure with a phosphorus atom located at the center.
Ключевые слова:	DONORS; IDENTIFICATION; NITROGEN; ELECTRON-SPIN RESONANCE; electron paramagnetic resonance; BARS technology; synthetic diamond; vacancy; nitrogen; phosphorus;
Издано:	2013