X-ray diffraction evidence of the single solid solution character of the mixed [TmxY1−x]3Al5O12 crystalline phosphor

Abstract X-ray diffractometry measurements show evidence that the lattice constant in the mixed crystal [Tm x Y 1− x ] 3 Al 5 O 12 follows Vegard's rule, leading to the conclusion that these mixed crystals form a single solid solution for the whole rage of compositions with Tm 3+ concentrations from x =0% to x =100% at. In addition RBS and optical absorption spectra confirm that the Tm 3+ ions are uniformly incorporated into the mixed crystals with concentrations close to the stoichiometric relative concentrations in weight of the corresponding precursor oxides.