THE METHOD OF ELECTRON PARAMAGNETIC RESONANCE FOR QUANTUM ELECTRONIC MATERIALS INVESTIGATION (YAG, YLuAG, YAP, YLuAP, PbGa 2 S 4 ) (original) (raw)

International Journal of Modern Physics: Conference Series, 2012

Abstract

The results of EPR investigations of the laser crystals and scintillators are presented, in particular, Y 3 Al 5 O 12: Dy 3+, Y 3 Al 5 O 12: Er 3+, ( Y 1-x Lu x)3 Al 5 O 12: Er 3+, YAlO 3: Er 3+, Ce 3+, Nd 3+ and Tm 3+, Y (1- x ) Lu x AlO 3 : Ce 3+, PbGa 2 S 4 : Dy 3+, Nd 3+ and Ce 3+. EPR signals of Er 3+, Ce 3+, Nd 3+ and Tm 3+ ions in YAlO 3, as well as of Dy 3+, Nd 3+ and Ce 3+ in lead thiogallate single crystals are detected and analyzed for the first time. The main values of g tensors and hyperfine interaction constants for Er 3+, Tm 3+, Nd 3+ and Dy 3+ odd isotopes are determined. In compositionally disordered compounds YLuAG and YLuAP several new paramagnetic Er 3+ and Ce 3+ centers are observed in comparison with YAG and YAP . These centers appear as a result of the changes in the crystal field symmetry and magnitude due to the isomorphic substitution of Lu 3+ for Y 3+ in the yttrium sublattice. The origin of these new paramagnetic centers is established and their formation...

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