High frequency (95GHz) electron spin resonance measurements were performed down to 5K, on 3 cubic boron nitride single crystals doped with Be. The measured samples exhibit at low temperature different electron spin resonance spectra, which were sensitive to low temperature in situ illumination using a series of Kr+- and Ar+-laser lines. The analysis of the electron spin resonance spectra resulted in the identification of several native paramagnetic centers responsible for the observed component spectra lines.

High-Frequency ESR of Native Point Defects in Beryllium-Doped c-BN Single Crystals. E.Goovaerts, S.V.Nistor, D.Ghica, T.Taniguchi: Physica Status Solidi A, 2004, 201[11], 2591-8