Manifestation of the specific structural features of lithium niobate single crystals of different composition in their Raman spectra

2008 ◽  
Vol 105 (6) ◽  
pp. 913-918 ◽  
Author(s):  
P. G. Chufyrev ◽  
N. V. Sidorov ◽  
M. N. Palatnikov ◽  
A. A. Yanichev
Keyword(s):  
Lithium Niobate ◽  
Single Crystals ◽  
Raman Spectra ◽  
Structural Features

Structural Features of Nominally Pure Lithium Niobate Crystals Grown from Boron-Doped Charge

2020 ◽  
Vol 312 ◽  
pp. 128-133
Author(s):  
Nikolay Sidorov ◽  
Roman Titov ◽  
Natalya A. Teplyakova ◽  
Mikhail Palatnikov ◽  
Alexander Vjacheslavovich Syuy
Keyword(s):  
Crystal Structure ◽  
Lithium Niobate ◽  
Single Crystals ◽  
Czochralski Method ◽  
Structural Features ◽  
Structural Defects ◽  
Cation Sublattice ◽  
Structural Units ◽  
Boron Doped ◽  
Lithium Niobate Crystals

The features of the structure of single crystals LiNbO3:B3+ (0.12 and 0.18 wt %) grown by the Czochralski method from the mixture of different genesis were studied. It was found that boron is able to incorporate into the crystal structure of lithium niobate in a trace amounts (~ 10–4–10–5 wt %), decreasing the concentration of structural defects NbLi. Thus, ordering of structural units of the cation sublattice of lithium niobate crystals grown from a congruent composition melt approach in that of stoichiometric crystals.

Manifestation of structural features in Raman spectra of LiNbO3 single crystals

2008 ◽  
Author(s):  
P. Chufyrev ◽  
N. Sidorov ◽  
M. Palatnikov ◽  
K. Bormanis
Keyword(s):  
Single Crystals ◽  
Raman Spectra ◽  
Structural Features

Raman spectra of photorefractive lithium niobate single crystals

2010 ◽  
Vol 77 (1) ◽  
pp. 110-114 ◽  
Author(s):  
N. V. Sidorov ◽  
A. A. Yanichev ◽  
P. G. Chufyrev ◽  
M. N. Palatnikov ◽  
B. N. Mavrin
Keyword(s):  
Lithium Niobate ◽  
Single Crystals ◽  
Raman Spectra

scholarly journals Raman Scattering in Non-Stoichiometric Lithium Niobate Crystals with a Low Photorefractive Effect

Crystals ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 535 ◽  
Author(s):  
Nikolay Sidorov ◽  
Mikhail Palatnikov ◽  
Alexandra Kadetova
Keyword(s):  
Lithium Niobate ◽  
Single Crystals ◽  
Raman Spectra ◽  
Photorefractive Effect ◽  
Polar Axis ◽  
Symmetry Type ◽  
Selection Rules ◽  
Zn Concentration ◽  
Lithium Niobate Crystals ◽  
Do So

Raman spectra of lithium niobate single crystals strongly doped by zinc and magnesium, it has been established, contain low-intense bands with frequencies 209, 230, 298, 694, and 880 cm−1. Ab ignition calculations fail to attribute these bands to fundamental vibrations of A2 symmetry type unambiguously. Such vibrations are prohibited by the selection rules in the space group C3V6 (R3c). Ab initio calculations also proved that low-intense “extra” bands with frequencies 104 and 119 cm−1 definitely do not correspond to vibrations of A2 symmetry type. We have paid special attention to these extra bands that appear in LiNbO3 single crystals Raman spectra despite the fact that they are prohibited by the selection rules. In order to do so, we have studied a number of lithium niobate single crystals, both nominally pure and doped, by Raman spectroscopy. We have assumed that some “extra” bands correspond to two-particle states of acoustic phonons with a total wave vector equal to zero. We have also detected a Zn concentration area (0.05–0.94 mol.% ZnO in a crystal) where doped crystal structure is more ordered: The order of alternation of the main, doping cations, and vacancies along the polar axis is increased, and oxygen octahedra are less distorted.

scholarly journals Investigations on Crystalline Perfection, Raman Spectra and Optical Characteristics of Transition Metal (Ru) Co-Doped Mg:LiNbO3 Single Crystals

ACS Omega ◽  
2021 ◽  
Author(s):  
M. K. Raseel Rahman ◽  
B. Riscob ◽  
Rajeev Bhatt ◽  
Indranil Bhaumik ◽  
Sarveswaran Ganesamoorthy ◽  
...  
Keyword(s):  
Transition Metal ◽  
Single Crystals ◽  
Raman Spectra ◽  
Optical Characteristics ◽  
Crystalline Perfection ◽  
Co Doped

Growth of Large-Scale Silver Lithium Niobate Single Crystals and Their Piezoelectric Properties

2006 ◽  
Vol 45 (9B) ◽  
pp. 7389-7396 ◽  
Author(s):  
Satoshi Wada ◽  
Akiko Saito ◽  
Takuya Hoshina ◽  
Hirofumi Kakemoto ◽  
Takaaki Tsurumi ◽  
...  
Keyword(s):  
Lithium Niobate ◽  
Single Crystals ◽  
Large Scale ◽  
Piezoelectric Properties

Effects of Ionising Radiation on Optical Properties of Lithium Niobate Single Crystals

2005 ◽  
Vol 318 (1) ◽  
pp. 113-118
Author(s):  
N. V. Sidorov ◽  
M. N. Palatnikov ◽  
V. T. Kalinnikov ◽  
I. V. Biryukova ◽  
K. Bormanis
Keyword(s):  
Optical Properties ◽  
Lithium Niobate ◽  
Single Crystals ◽  
Ionising Radiation

Raman spectra of lanthanide sesquioxide single crystals: Correlation between A and B-type structures

1981 ◽  
Vol 38 (3) ◽  
pp. 288-296 ◽  
Author(s):  
J. Gouteron ◽  
D. Michel ◽  
A.M. Lejus ◽  
J. Zarembowitch
Keyword(s):  
Single Crystals ◽  
Raman Spectra ◽  
Lanthanide Sesquioxide

The Gold Sulfates MAu(S04)2 (M = Na, K, Rb)

2001 ◽  
Vol 56 (12) ◽  
pp. 1340-1343 ◽  
Author(s):  
Mathias S. Wickleder ◽  
Oliver Büchner
Keyword(s):  
Sulfuric Acid ◽  
Single Crystals ◽  
Crystal Structures ◽  
Structural Features ◽  
Monovalent Cations ◽  
Coordination Numbers ◽  
Square Planar ◽  
Oxygen Atoms

AbstractThe evaporation of a solution of Au(OH)3 and Na2So4 in conc. sulfuric acid led to yellow single crystals of NaAu(SO4)2 (monoclinic, P21/n, Z = 2, a = 469.1, b = 845.9, c = 831.2 pm, β = 95.7°). Analogous procedures with K2SO4 or Rb2SO4 instead of Na2SO4 yielded single crystals of KAu(SO4)2 (monoclinic, C2/c, Z = 4, a = 1109.8, b = 724.2, c = 941.1 pm, β = 118.4°) and RbAu(S04)2, respectively, (triclinic, P1̄, Z = 1, a = 423.6, b = 497.5, c = 889.0 pm, a = 76.4°, β = 88.4°, γ = 73.5°). Although the crystal structures of the three sulfates are not isotypic they show similar structural features: The gold atoms are coordinated by four oxygen atoms in a square planar manner. These oxygen atoms belong to four SO42- ions which link the [AUO4] units to infinite chains according to 1∞[Au(SO4)4/ 2]- . These chains are connected via the monovalent cations which show coordination numbers of 6 (Na+), 10 (K+) and 12 (Rb+), respectively.

Sign in / Sign up

Export Citation Format

Share Document