EPR detection of Cr4+centers in yttrium orthosilicate Y2SiO5
OPTICAL MATERIALS(2023)
Abstract
The EPR spectra of Czochralski grown Y2SiO5:Cr and Y2SiO5:53Cr crystals have been studied. In addition to the previously known spectra of Cr3+, the spectrum of the Cr4+ ion was detected and studied for the first time. The fine structure parameters of tetravalent chromium in Y2SiO5 host were obtained based on the analysis of the angular and frequency-field dependences of the EPR spectra. The conclusion about tetrahedral coordination of Cr4+ ion in this host was made. The concentrations ratio of c(Cr3+)/c(Cr4+) ions in the crystal has been evaluated.
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Key words
Yttrium orthosilicate,Y2SiO5,Cr4+,EPR,Near-IR lasers
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