Optical in situ Study of Reduction/Oxidation Processes in Cr,Mg:YAG Epitaxial Film
O. Buryya, S. Ubizskiia, I.I. Syvorotkab and K.-D. Beckerc
a Institute of Telecommunications, Radioelectronics and Electronic Engineering, Lviv Polytechnic National University, Bandery 12, 79046 Lviv, Ukraine
b Scientific Research Company "Carat", Stryjska 202, 79031 Lviv, Ukraine
c Institute of Physical and Theoretical Chemistry, Technical University Braunschweig, Hans-Sommer-Str. 10, D-38106 Braunschweig, Germany
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The changes of the optical absorption spectra of Cr,Mg:YAG epitaxial film caused by high-temperature redox treatment are investigated by means of in situ spectroscopy. The spectra were registered in the visible and near-IR spectral regions at temperatures up to 1100 K. The kinetics of optical absorption changing were obtained in the temperature range from 936 K to 1091 K and were described by mathematical model connecting the chromium recharging process with oxygen vacancies diffusion. The parameters of the model were determined from the approximations of the experimental kinetics.
DOI: 10.12693/APhysPolA.117.184
PACS numbers: 61.72.Cc, 66.30.Dn, 66.30.hd, 78.30.Hv, 78.40.Ha