Optical spectroscopy analysis of YBa2Cu3O7at room temperature and at 10 K

摘要

Optical spectra of sputtered excited particles emitted during fast Kr+ion bombardment of YBa2Cu3O7above and below the critical temperatureTcsim;90 K were recorded between 190.0 and 679.3 nm. Intensities and positions of lines are discussed and interpreted. The two optical spectra exhibit discrete lines which are attributed to neutral excited Cu, Ba, and Y and a few lines attributed to ionic Ba and Y. The relative intensities are the same at 10 K and at room temperature, while the absolute intensity increases by 40percnt;. A small continuum attributed to oxide is also observed in the two spectra.