Control of intrinsic defects in lithium niobate single crystal for optoelectronic applications

R Bhatt, I Bhaumik, S Ganesamoorthy, R Bright… - Crystals, 2017 - mdpi.com
A single crystal of lithium niobate is an important optoelectronic material. It can be grown
from direct melt only in a lithium deficient non-stoichiometric form as its stoichiometric …

Urbach tail and bandgap analysis in near stoichiometric LiNbO3 crystals

R Bhatt, I Bhaumik, S Ganesamoorthy… - … status solidi (a), 2012 - Wiley Online Library
Energy of the indirect and direct optical bandgap of near‐stoichiometric lithium niobate
(nSLN) crystals is evaluated by optical absorption measurement. The value of the indirect …

Effect of cooling rate on phase transitions and ferroelectric properties in 0.75 BiFeO3-0.25 BaTiO3 ceramics

DS Kim, CI Cheon, SS Lee, JS Kim - Applied Physics Letters, 2016 - pubs.aip.org
The effect of the cooling rate on the electrical properties was investigated in the 0.75 BiFeO
3-0.25 BaTiO 3 ceramics. The air-quenched samples had superior ferroelectric and …

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

MKR Rahman, B Riscob, R Bhatt, I Bhaumik… - ACS …, 2021 - ACS Publications
Congruent lithium niobate single crystals with a Ru: Mg co-dopant have been successfully
grown using the Czochralski technique from the melt containing 0.02 mol% Ru with Mg of …

Structural changes in potassium sodium niobate ceramics sintered in different atmospheres

JG Fisher, D Rout, KS Moon, SJL Kang - Journal of Alloys and Compounds, 2009 - Elsevier
Polycrystalline (K0. 5Na0. 5) NbO3 ceramics were sintered in five different atmospheres (O2,
air, N2, 75 N2–25 H2 (mol%) and H2). The structure, phase transitions and phonon …

Synthesis, Studies of Inorganic Class of Mohrite (MOH) Crystals for Electrical, Electronic, Photonic, Phase Matching and Sensor Utilities by Theory and Practice

K Suganya, R Hariharasuthan… - ECS Journal of Solid …, 2024 - iopscience.iop.org
The high-quality single crystals of Mohrite (MOH) with dimensions 7× 6× 3 mm 3 were
productively grown-up by the customary solution growth methodology. The fully grown …

High-temperature X-ray diffraction and Raman spectroscopy study of (K0. 5Na0. 5) NbO3 ceramics sintered in oxidizing and reducing atmospheres

JG Fisher, D Rout, KS Moon, SJL Kang - Materials Chemistry and Physics, 2010 - Elsevier
The effect of sintering atmosphere on the structure and phase transitions of (K0. 5Na0. 5)
NbO3 lead-free piezoelectric ceramics has been studied. Ceramics were produced by …

LiTaO phonon dispersion and ferroelectric transition calculated from first principles

M Friedrich, A Schindlmayr, WG Schmidt… - physica status solidi …, 2016 - Wiley Online Library
Abstractauthoren The phonon dispersions of the ferro‐and paraelectric phase of LiTaO are
calculated within density‐functional perturbation theory. The longitudinal optical phonon …

Growth and characterization of undoped and Mn doped lead-free piezoelectric NBT–KBT single crystals

R Subramaniyan, I Bhaumik, S Ganesamoorthy… - Materials Research …, 2014 - Elsevier
Lead-free piezoelectric single crystals of undoped and 1 wt% Mn doped 0.80 Na 0.5 Bi 0.5
TiO 3–0.20 K 0.5 Bi 0.5 TiO 3 (NKBT) was grown using self-flux. Powder X-ray diffraction …

Optical bandgap and electrical conductivity studies on near stoichiometric LiNbO3 crystals prepared by VTE process

R Bhatt, S Ganesamoorthy, I Bhaumik… - Journal of Physics and …, 2012 - Elsevier
Vapour transport equilibrium (VTE) technique was used to prepare near stoichiometric
LiNbO3 (NSLN) crystals. Simultaneous occurrence of reduction has been observed during …