ESR study of effects of pressure treatment, temperature and annealing on the structure of the impurity Cr3+ centers in chalcogenide glasses

Abstract The effects of pressure treatment up to 77 kbar of temperature and of annealing on the structure of the impurity Cr 3+ centres in glasses As 2 Se 3 (I), 5Cu 95As 2 Se 3 (II) and TlAsS 2 (III) was studied by the EPR method. The high pressure treatment of (I) and (II) leads to considerable changes of the EPR parameters and their temperature dependences due to the increase of the zero field splittings of the Cr 3+ energy levels, connected with non-reversible local structure changes in glasses.