scholarly journals STUDY ON RAMAN SPECTRA OF POLAR-PHONONS AND POLARITONS IN BaTiO3 AND Ce:BaTiO3 SINGLE CRYSTALS

1996 ◽  
Vol 45 (6) ◽  
pp. 1059
Author(s):  
ZENG LING-ZHI ◽  
WANG RONG-PING ◽  
JIANG YI-JIAN ◽  
ZHU YONG ◽  
LIU YU-LONG
Keyword(s):  
Single Crystals ◽  
Raman Spectra

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

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

Growth of Yb:Y2O3 single crystals by the micro-pulling-down method

2004 ◽  
Vol 848 ◽  
Author(s):  
A. Novoselov ◽  
J. H. Mun ◽  
A. Yoshikawa ◽  
G. Boulon ◽  
T. Fukuda
Keyword(s):  
Single Crystal ◽  
Single Crystals ◽  
Raman Spectra ◽  
Lattice Constant ◽  
Decay Time ◽  
Dopant Distribution ◽  
High Homogeneity ◽  
Linear Decrease ◽  
Crystal Laser

ABSTRACT(Ybx Y1-x)2O3 (x = 0.0, 0.005, 0.05, 0.08 and 0.15) promising single crystal laser rods of 4.2 mm in diameter and 15–20 mm in length have been grown from the rhenium crucible by the micro-pulling-down method in Ar + H2(3–4%) atmosphere. Linear decrease of lattice constant with the increase of Yb3+-content was observed. High homogeneity of the Yb3+-dopant distribution has been demonstrated. Absorption, emission and Raman spectra have been recorded and decay time was approximated.

Low frequency Raman spectra of the liquid and plastic crystal phases of O2, N2, CO, and of Ar crystals with these molecules as guests

1982 ◽  
Vol 60 (9) ◽  
pp. 1358-1364 ◽  
Author(s):  
N. H. Rich ◽  
M. J. Clouter ◽  
H. Kiefte ◽  
S. F. Ahmad
Keyword(s):  
Single Crystals ◽  
Raman Spectra ◽  
Phonon Mode ◽  
Low Frequency ◽  
Impurity Molecule ◽  
Spectral Features ◽  
Background Impurity ◽  
Crystal Phases ◽  
Distinct Features ◽  
Frequency Feature

Low frequency Raman spectra of single crystals of orientationally disordered phases of oxygen, nitrogen, and carbon monoxide, and spectra of those substances as liquids show two linear segments in semi-log plots. Slopes of the higher frequency segments are nearly equal for all cases; slopes of the lower frequency segments are particular to the substance and are nearly the same in both liquid and crystal for O2 and CO. Spectra of single crystals of argon doped with O2, N2, or CO show two distinct features superimposed on a sloping background. Impurity molecule reorientation apparently accounts satisfactorily for all spectral features, but translation–rotation coupling may allow a contribution to the higher frequency feature arising from a local phonon mode in argon.

Raman spectra of lead chalcogenide single crystals

2004 ◽  
Vol 1 (11) ◽  
pp. 3110-3113 ◽  
Author(s):  
S. V. Ovsyannikov ◽  
Y. S. Ponosov ◽  
V. V. Shchennikov ◽  
V. E. Mogilenskikh
Keyword(s):  
Single Crystals ◽  
Raman Spectra ◽  
Lead Chalcogenide

scholarly journals Synthesis and Structural Properties of Nanocomposites Based on Synthetic Opals and Active Dielectrics

2019 ◽  
Vol 12 (1) ◽  
pp. 19
Author(s):  
Bilal Abu Sal
Keyword(s):  
Raman Spectroscopy ◽  
Single Crystals ◽  
Structural Properties ◽  
Raman Spectra ◽  
Phase Structure ◽  
Opal Matrix ◽  
X Ray Diffraction ◽  
X Ray ◽  
Crystal State ◽  
Synthetic Opals

This work is devoted to generalize and analyze the previouse results of new photonic-crystalline nanomaterials based on synthetic opals and active dielectrics. Data were characterized by X-ray diffraction and Raman spectroscopy. Active dielectrics infiltrated into the pores of the opal from the melt. The phase structure composition of the infiltrated materials into the pores of the opal matrix were analyzed. The results of x-ray diffraction and Raman spectra allowed to establish the crystal state of active dielectrics in the pores of the opal. The Raman spectra of some opal-active dielectric nanocomposites revealed new bands and changes in band intensities compared to the spectra of single crystals of active dielectrics. Further more, differences in band intensities in the spectra were measured at different spots of the sample‘s surface were observed. The revealed changes were attributed to the formation of new crystalline phases due to the injected dielectrics in opal pores.

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