Abstract
Cr3+ and Nd3+ non-equivalent crystal field sites were observed. By use of a high-resolution dye laser,2E and4A2 splittings, zero-phonon4A2 →2E,2T1,4T2 transitions and vibronic levels of2E doublets of Cr3+ non-equivalent centres were recorded. Energy transfers from Cr3+ multisites to Nd3+ were studied by site-selective spectroscopy and fluorescence decays.
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