Structural study and the effect of ionic size of the systems (Gd_1-x Lu_x) ₃Al₅ O₁₂ doped erbium.

Abstract

The structure of cubic Garnets multi-components based on Gadolinium (GAG) undoped or doped rare earth, stabilized by Lanthanide as Lutetium, which has weak ionic radius recently attracts much attention to obtain the phases thermodynamically stables. In this work, we have chosen to study the development of compositions of type (Gd_{1 - x} Lu_x) ₃Al₅ O₁₂ (x = 0, 2 - 0, 3) doped 2 and 5 at % Er⁺³. The polycrystalline powders were prepared by reaction solid state method. DRX analyses on these synthesized powders confirmed the results of the phases of GdAlO₃ perovskite and Gd₃Al₅O₁₂ garnet due to the higher content of gadolinium stabilized by Lutetium. FTIR analyses have shown the active vibrations modes associated on the specifics absorption bands of M – O (M: metallic elements Gd and Lu or Al). The optical analyzes carried out by the photoluminescence spectroscopy which it study the transitions of Erbium (Er³⁺) as doping elements in elaborated samples is of great optical importance.