Open AccessX-RAY studies of ferroelectric lithium niobate crystals doped with rare earth elements
Author(s) -
А. В. Кадетова,
AUTHOR_ID,
М. Н. Палатников,
О. В. Сидорова,
D. A. Vorobyov,
AUTHOR_ID,
AUTHOR_ID,
AUTHOR_ID
Publication year - 2021
Publication title -
trudy kolʹskogo naučnogo centra ran
Language(s) - English
Resource type - Journals
ISSN - 2307-5252
DOI - 10.37614/2307-5252.2021.2.5.023
Subject(s) - samarium , octahedron , niobium , lithium niobate , crystallography , crystal structure , materials science , doping , ferroelectricity , lithium (medication) , diffraction , bond length , chemistry , inorganic chemistry , optics , physics , metallurgy , medicine , optoelectronics , dielectric , endocrinology
The lattice structural distortions of LiNbO3 crystals doped with samarium with a concentration of 1.0, 1.9, 2.5 mol. % were studied by X-ray diffraction methods. It was found that the samarium atoms and some of the niobium atoms occupied the vacant positions of lithium in the crystal lattice, and some of the niobium atoms were located in the empty octahedron. The octahedra of SmLiO6 was distorted more strongly than octahedra of NbLiO6 when niobium atoms entered the vacant positions of lithium. The smallest changes in the bond lengths in the octahedra of the main motif and in the defect region as well as along the polar axis in the lithium niobate lattice were observed in the sample with a samarium concentration of 2.5 mol. %.