https://doi.org/10.1140/epjb/e2005-00062-2
The H+ related defects involved in domain reversal for both near-stoichiometric and heavily Mg-doped lithium niobate crystals
1
R&D Center for Photon-Electro materials, Nankai
University, Tianjin 300071, China
2
Photonics Center, College of
Physical Science, Nankai University, Tianjin 300071, China
Corresponding author: a fls@mail.nankai.edu.cn
Received:
27
July
2004
Published online:
15
March
2005
Domain reversal was performed on both
near-stoichiometric and heavily Mg-doped lithium niobate crystals.
H+ related defect structures in these two types of crystals
were studied through the infrared absorption spectra. It is found
that the intensity of some decomposed peaks of absorption band
change apparently during domain reversal for near-stoichiometric
lithium niobate crystals but not for heavily Mg-doped lithium
niobate crystals. According to these experimental results,
distinct models about H+ related defect structure in LiNbO3
lattice were supposed for them. Nb and Mg
were considered as the centers of H+ related defect complex
for near-stoichiometric and heavily Mg-doped lithium niobate
crystals respectively. Different behavior of them was used to
explain the difference of infrared absorption spectra during
domain reversal between two types of crystals.
PACS: 78.30.-j – Absorption spectra / 61.50.Nw – Crystal stoichiometry / 61.72.Ji – Point defects
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2005