MOESSBAUER AND OPTICAL INVESTIGATION OF Eu:YAG NANOCRYSTALS SYNTHESIZED BY A SOL-GEL METHOD

摘要

The morphological changes induced by the thermal treatments of YAG: Eu crystals synthesized by a sol-gel method have investigated using the Mossbauer and optical techniques. Both methods exhibit a drastic change of the spectral parameters at amorphous - garnet phase transition, followed by a slow evolution of these parameters with the increase of the annealing temperature. This slow evolution is due to the increase in size of the nanocrystals.