RAMAN AND INFRARED TRANSMITTANCE SPECTRA OF DOPED KLN CRYSTAL

Abstract

Raman and Infrared Transmittance Spectra of KLN and Doped KLN Crystal have been carried out. The Raman spectra of KLN and doped KLN crystal were basically alike, which justified the fact that the ions of impurities entered the lattice by replacement of original ions of KLN crystal. The result of Infrared Transmittance Spectra showed that, compared with the KLN crystal, the number and site of absorption peaks of OH−1 vibration in doped KLN changed, only one peak existed in Fe:KLN and Cu:KLN, which located at higher wave numbers 3520 cm−1 and lower wave numbers 3488 cm−1 respectively, while, there existed two peaks in KLN at 3519 cm−1 and 3504 cm−1 respectively. It suggested that Fe cation replaced Nb cation, and Cu cation replaced K cation when they entered the lattice of crystal.