Distribution of N+ centers in synthetic diamond single crystals

Abstract

The distribution of N+ centers in synthetic diamond grown by the temperature-gradient method in a nickel-containing metal-carbon system has been studied using FTIR mapping. The results clearly demonstrate that the distribution has a complex nature and is directly related to the sectorial structure of the crystal and linear growth rate, whose effects are analyzed with consideration for literature data. The aggregation rate of N+ single nitrogen is slower than that of neutral substitutional nitrogen (C centers).