A New EPR Data on the MA1 and NIRIM8 (NP1) Phosphorus-Related Centers in Synthetic 1b Diamonds
A New EPR Data on the MA1 and NIRIM8 (NP1) Phosphorus-Related Centers in Synthetic 1b Diamonds
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关于合成 1b 钻石中 MA1 和 NIRIM8 (NP1) 磷相关中心的新 EPR 数据
DOI:
10.1007/s00723-011-0259-8
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发表时间:
2011
影响因子:
1
通讯作者:
Nadolinny V
中科院分区:
文献类型:
--
作者:
Nadolinny V
Microdiamonds grown under high-pressure and high-temperature conditions from a P–C medium at different temperatures have been studied by electron paramagnetic resonance (EPR). Two paramagnetic centers P1 and MA1 were observed in microdiamonds grown at 1,873 K. Analysis of weak lines around these centers suggests that they may be due to13C hyperfine structure (HFS) of the MA1 center. The calculateds/phybridization parameter for this carbon atom (C1) was similar to that for the undistorted lattice. At a growth temperature of 1,973 K, in addition to MA1 and P1, a new center, labeled NP1, with HFS from nitrogen and phosphorus atoms and with EPR parameters similar to NIRIM 8 was identified. The NP1 (NIRIM8) centers have an electron spinS= 1/2. We propose that nitrogen–phosphorus defects are created through subsequent migration of nitrogen atoms towards phosphorus atoms upon increasing of the growth.
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