Spectroscopic investigations of Gd3Sc2Ga3O12 garnet doped with Cr3+ and Nd3+ ions

Absorption, excitation and emission spectra as well as decay time measurements at 10, 77, and 300 K were performed for Ga3Gd3Sc2O12 garnet single-crystal doped with Cr3+ and Nd3+ ions. Strong reabsorption of Cr3+ emission by Nd3+ absorption lines was observed. The assignments of f–f and d–d transitions were proposed. The broad emission band of chromium ions is an indication that weak/intermediate crystal field strength is present at the Cr3+ site.