Temperature-dependent Raman study of taurine single crystal

2001 ◽  
Vol 32 (9) ◽  
pp. 751-756 ◽  
Author(s):  
R. J. C. Lima ◽  
P. T. C. Freire ◽  
J. M. Sasaki ◽  
F. E. A. Melo ◽  
J. Mendes Filho ◽  
...  
Keyword(s):  
Single Crystal ◽  
Temperature Dependent ◽  
Raman Study

Temperature-dependent Raman study ofL-arginine hydrochloride monohydrate single crystal

2002 ◽  
Vol 33 (8) ◽  
pp. 625-630 ◽  
Author(s):  
R. J. C. Lima ◽  
P. T. C. Freire ◽  
J. M. Sasaki ◽  
F. E. A. Melo ◽  
J. Mendes Filho
Keyword(s):  
Single Crystal ◽  
Temperature Dependent ◽  
Arginine Hydrochloride ◽  
Raman Study ◽  
Hydrochloride Monohydrate

Ternary Antimonides RE4T7Sb6 (RE=Gd–Lu; T =Ru, Rh) with Cubic U4Re7Si6-type Structure

2013 ◽  
Vol 68 (9) ◽  
pp. 971-978 ◽  
Author(s):  
Inga Schellenberg ◽  
Ute Ch. Rodewald ◽  
Christian Schwickert ◽  
Matthias Eul ◽  
Rainer Pöttgen
Keyword(s):  
Magnetic Susceptibility ◽  
Single Crystal ◽  
Magnetic Moment ◽  
Induction Furnace ◽  
X Ray Diffraction ◽  
Temperature Dependent ◽  
X Ray ◽  
Antiferromagnetic Ordering ◽  
Arc Melting ◽  
Intermediate Valent

The ternary antimonides RE4T7Sb6 (RE=Gd-Lu; T =Ru, Rh) have been synthesized from the elements by arc-melting and subsequent annealing in an induction furnace. The samples have been characterized by powder X-ray diffraction. Four structures were refined on the basis of single-crystal X-ray diffractometer data: U4Re7Si6 type, space group Im3m with a=862.9(2) pm, wR2=0.0296, 163 F2 values for Er4Ru7Sb6; a=864.1(1) pm, wR2=0.1423, 153 F2 values for Yb4Ru7Sb6; a=872.0(2) pm, wR2=0.0427, 172 F2 values for Tb4Rh7Sb6; and a=868.0(2) pm, wR2=0.0529, 154 F2 values for Er4Rh7Sb6, with 10 variables per refinement. The structures have T1@Sb6 octahedra and slightly distorted RE@T26Sb6 cuboctahedra as building units. The distorted cuboctahedra are condensed via all trapezoidal faces, and this network leaves octahedral voids for the T1 atoms. The ruthenium-based series of compounds was studied by temperature-dependent magnetic susceptibility measurements. Lu4Ru7Sb6 is Pauli-paramagnetic. The antimonides RE4Ru7Sb6 with RE=Dy, Ho, Er, and Tm show Curie-Weiss paramagnetism. Antiferromagnetic ordering occurs at 10.0(5), 5.1(5) and 4.0(5) K for Dy4Ru7Sb6, Ho4Ru7Sb6 and Er4Ru7Sb6, respectively, while Tm4Ru7Sb6 remains paramagnetic. Yb4Ru7Sb6 is an intermediate-valent compound with a reduced magnetic moment of 3.71(1) μB per Yb as compared to 4.54 μB for a free Yb3+ ion

scholarly journals Raman study of uniaxial deformation of single-crystal mats of ultrahigh molecular weight linear polyethylene

2015 ◽  
Vol 594 ◽  
pp. 012010 ◽  
Author(s):  
Yu V Zavgorodnev ◽  
S N Chvalun ◽  
G Yu Nikolaeva ◽  
E A Sagitova ◽  
P P Pashinin ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Single Crystal ◽  
Uniaxial Deformation ◽  
Linear Polyethylene ◽  
Ultrahigh Molecular Weight ◽  
Raman Study

Dynamics and mechanism of the Crystal II → smecticG phase transition in TB7A by a temperature-dependent micro-Raman study and DFT calculations

2009 ◽  
Vol 40 (8) ◽  
pp. 881-886 ◽  
Author(s):  
K. Vikram ◽  
Sunil K. Srivastava ◽  
Animesh K. Ojha ◽  
S. Schlücker ◽  
W. Kiefer ◽  
...  
Keyword(s):  
Phase Transition ◽  
Dft Calculations ◽  
Temperature Dependent ◽  
Raman Study

Temperature-dependent Raman study of PrFeO3thin film

2011 ◽  
Vol 42 (2) ◽  
pp. 201-208 ◽  
Author(s):  
Feroz Ahmad Mir ◽  
M. Ikram ◽  
Ravi Kumar
Keyword(s):  
Temperature Dependent ◽  
Raman Study

scholarly journals Temperature-Dependent Raman Scattering of Large Size Hexagonal Bi2Se3 Single-Crystal Nanoplates

2018 ◽  
Vol 8 (10) ◽  
pp. 1794 ◽  
Author(s):  
Fang Zhou ◽  
Yujing Zhao ◽  
Weichang Zhou ◽  
Dongsheng Tang
Keyword(s):  
Electron Microscope ◽  
Single Crystal ◽  
Temperature Coefficient ◽  
Thermoelectric Materials ◽  
Large Scale ◽  
X Ray Diffraction ◽  
Temperature Dependent ◽  
Large Size ◽  
Transmission Electron ◽  
High Figure

Bi 2 Se 3 has extensive application as thermoelectric materials. Here, large-scale Bi 2 Se 3 single-crystal hexagonal nanoplates with size 7.50–10.0 μ m were synthesized successfully by hydrothermal method. X-ray diffraction (XRD), scanning electron microscope (SEM), and transmission electron microscope (TEM) were used to characterize the Bi 2 Se 3 nanoplates, which confirm the single-crystal quality and smooth surface morphology with large size. Micro-Raman spectra over a temperature range of 83–603 K were furthermore used to investigate the lattice dynamics of Bi 2 Se 3 nanoplates. Both 2A g 1 and 1E g 2 modes shift evidently with reduced temperature. The line shape demonstrates a significant broadening of full width at half maximum (FWHM) and red-shift of frequency with increased temperature. The temperature coefficient of A 1 g 1 , E g 2 , A 1 g 2 modes were determined to be −1.258 × 10 − 2 cm − 1 /K, −1.385 × 10 − 2 cm − 1 /K, −2.363 × 10 − 2 cm − 1 /K, respectively. Such low temperature coefficient may favor the obtaining of a high figure of merit (ZT) and indicate that Bi 2 Se 3 nanoplates were used as excellent candidates of thermoelectric materials.

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