Optical Detection of Paramagnetic Centres in Activated Oxyfluoride Glass-Ceramics
U. Rogulisa, A. Fedotovs a, A. Antuzevics a, Dz. Berzins a, Ya. Zhydachevskyyb,c and D. Sugak c
aInstitute of Solid State Physics, University of Latvia, 8 Kengaraga Str., Riga, Latvia
bInstitute of Physics, Polish Academy of Sciences, Warsaw, Poland
cLviv Polytechnic National University, Lviv, Ukraine
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Electron paramagnetic resonance (EPR), magnetic circular dichroism (MCD) and EPR detected via MCD (MCD-EPR) investigations have been performed on rare-earth activated oxyfluoride glasses and glass-ceramics. Er3+, Gd3+, and Mn2+ activators in oxyfluoride glass-ceramics show paramagnetic MCD behaviour and the MCD-EPR has been detected. The results of the MCD-EPR measurements for the Er-doped oxyfluoride glass-ceramics showed that Er3+ ions in the CaF2 crystallites in these ceramics embed only in the cubic symmetry environment, similarly to the previous observations of cubic Gd3+ centres in the glass-ceramics containing CaF2. Finally, the correlation of optics and paramagnetic centres is discussed for Mn-doped YAlO3 ceramics.

DOI: 10.12693/APhysPolA.133.1088
PACS numbers: 76.70.Hb, 76.30.-v