Magneto-Optical Spectroscopy and Optical Detection of EPR Spectra of Yb~(3+) Paramagnetic Centers with Cubic Symmetry in Single Crystals MeF_2 (Me = Cd, Ca, Pb)

摘要

Cubic paramagnetic centers formed by Yb~(3+) impurity ions in fluorite-type crystals MeF_2 (Me = Cd, Ca, Pb) have been investigated using electron paramagnetic resonance, magnetic circular dichroism, magnetic circular polarization of luminescence, Zeeman splitting of optical absorption and luminescence lines, and opti_cal detection of electron paramagnetic resonance. The g factors of the~2Γ_7 state in the excited multiplet~2F_(5/2) of Yb~(3+) ions in MeF_2 crystals, the hyperfine interaction constant~(171)A (~(171)Yb) for the excited multiplet~2F_(5/2) in the CaF_2 crystal, and the energies and symmetry properties of all energy levels of Yb~(3+) ions in MeF_2 crystals are determined. The crystal-field parameters for the crystals under investigation are calculated.