Crystal growth and optical properties of Co2+-doped SrLaGa3O7

Abstract

Cobalt doped SrLaGa3O7 single crystals have been grown by the Czochralski method in a nitrogen atmosphere and by a floating zone method with optical heating in air. Starting concentrations of Co in the melt were: 0.15, 0.3, 2 and 3 mol percent with respect to Ga by the Czochralski method whereas 2 and 4 mol percent by the floating zone method. We have presented absorption spectra as well as EPR spectra related to octahedrally coordinated Co2+ ion in SrLaGa3O7.