with a radio frequency (RF) radical nitrogen source for the first time. The nitrogen (N)
composition was well-controlled by the N 2 flow rate and was increased up to 2.7%,
maintaining a good crystal quality. The maximum N composition was estimated to be 20%
by a secondary ion mass spectroscopy (SIMS) measurement. The N composition estimated
from both X-ray diffraction measurements and SIMS measurements were in good …