Transmission measurements in the nonsaturated or Urbach’s region were done from room temperature up to 853 K. A strong change in reflectivity with temperature is reported.
© 1978 Optical Society of America
G. A. Barbosa, R. S. Katiyar, and S. P. S. Porto, "Optical properties of SrTiO3 at high temperatures," J. Opt. Soc. Am. 68, 610-614 (1978)