Far-infrared spectra of dysprosium doped yttrium aluminum garnet nanopowder

• YAG:Dy nanopowder was produced by Solution Combustion Synthesis (SCS) method.
• Powders are composed by well-defined and separated nanoparticles.
• Some particles are agglomerated but there are also separated particles.
• The dielectric function was modeled by the Maxwell–Garnet formula.
• Optical phonon confinement is registered.

The solution combustion synthesis was used to prepare nanopowders of yttrium aluminum garnet (YAG) and YAG doped with dysprosium ions, Dy3+, (YAG:Dy). The morphology, specific surface area, texture, and optical properties of the prepared materials were studied by the means of scanning electron microscopy (SEM), nitrogen adsorption method, and far-infrared spectroscopy at room temperature in the spectral region between 80 and 600 cm−1. It was established that all the examined samples were microporous. The Maxwell–Garnet formula was used to model dielectric function of YAG and YAG:Dy nanopowders as mixtures of homogenous spherical inclusions in air.

Figure optionsDownload as PowerPoint slide