Influence of nonstoichiometry and iron doping on optical absorption in KNbO3 single crystal

TL;DR

This study explores how nonstoichiometry and iron doping affect the optical absorption properties of KNbO3 single crystals, highlighting the influence of growth conditions and defects on their optical behavior.

Contribution

It provides new insights into the effects of nonstoichiometry and iron doping on optical absorption in KNbO3 crystals, with detailed analysis of how defects influence their properties.

Findings

Iron doping and nonstoichiometry significantly alter optical absorption spectra.

Technological conditions during growth impact defect formation and optical properties.

Doping induces lattice defects that modify optical absorption characteristics.

Abstract

Single crystals of KNbO3 and KNbO3 : Fe have been grown using the flux method at various technological conditions. The investigations of optical absorption of these crystals were carried out. Marked influence of technological conditions and doping with iron on optical absorption has been found. Observed changes of the absorption spectra are associated with lattice defects arising due to nonstoichiometry and/or doping.