Optical absorption spectra of in (YGG)

Optical absorption spectra of trivalent europium in the rare-earth garnet Y3Ga5O12 (YGG) have been recorded between 4600 and 32 000 cm(-1) at 77 and at 293 K. A total of 117 crystal-field transitions has been detected in the spectra. The symmetry of the Eu3+ Site is D2, so a total removal of the crystal-field degeneracy of the 4f(6) configuration can be expected. The energy level scheme of Eu3+ in YGG is parametrized in terms of 20 free-ion parameters and nine crystal-field parameters. The crystal field is strong in the garnet host, so J-mixing has to be taken into account for the crystal-field calculation.

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