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http://dx.doi.org/10.4191/KCERS.2011.48.4.278

Optical and Dielectric Properties of Reduced SrTiO3 Single Crystals  

Kang, Bong-Hoon (Department of Visual Optics, Far East University)
Publication Information
Journal of the Korean Ceramic Society / v.48, no.4, 2011 , pp. 278-281 More about this Journal
Abstract
The optical band gap energy for $SrTiO_3$ by reduction at high temperature was 3.15 eV. The reflectivity of reduced $SrTiO_3$ single crystals showed little variation, however, the reflectivity by the reduction condition had no effect. For the phonon mode at about 790 $cm^{-1}$, a blue-shift took place upon $N_2$ reduction and the decreased. However, a red-shift took place upon a $H_2-N_2$ reduction and the increased at the same phonon mode. With decreasing temperature the dielectric constant decreased rapidly. The thermal activation energies were 0.92-1.02 eV.
Keywords
Reduction; Optical band gap; Infrared reflectivity; Thermal activation energy;
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