Two types of a new triplet centers labeled as N-V have been observed in heavily neutron
irradiated (dose of 1021 cm-2) and high-temperature annealed (2000°C) 6H-SiC crystals. The centers
have an axial symmetry along c-axis. Anisotropic hyperfine splitting due to the one 14N nucleus has
been observed. The EPR spectra of N-V defects in the triplet state in 6H-SiC reveal strong
temperature dependence. The parameters of these centers are similar to that for well-known N-V
center in diamond. It seems to consist of silicon vacancy and carbon substitutional nitrogen in the
adjacent lattice cites oriented along c-axis. Similar to the diamond N-V centers in SiC have been
produced by neutron irradiation and high-temperature annealing of the crystals containing nitrogen.
For the first shell the structure of the N-V defect in 6H-SiC is practically identical with that in
diamond. The charge state of this defect seems to be +1 compare with neutral state for nitrogensilicon
vacancy defect in 6H-SiC with S=1/2.
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