The confirmation of Mg Nb defects in heavily MgO doped LiNbO 3 single crystals were investigated through optical absorption, electrical conductivity measurements, optical spectroscopy with nanosecond time resolution, and Raman spectroscopy technique. An increase in the MgO concentration up to 10 mole% provides an essential change of the luminescence of LiNbO 3, the appearance of a supplementary optical absorption band at the 1.1 eV, an alteration of the Raman spectra caused by the formation of (Mg Nb) defects, a shift of the edge of the supplementary optical absorption due to ion irradiation toward the shorter wavelength region as the MgO concentration increases. The effect of Ar + ions irradiation on the conduction of the MgO doped LiNbO 3 samples was studied. The important role of reduction in modification of the conducting properties of the ion-irradiated crystals was established. The increase of the MgO concentration leads to a decrease of the reduction efficiency.
|Title of host publication||Physica Status Solidi C: Conferences|
|Number of pages||4|
|Publication status||Published - 2005|
ASJC Scopus subject areas
- Condensed Matter Physics