91 citations · 259 across the 11 of their papers we have counts for
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Raman spectra of L-leucine crystals
P. F. Facanha Filho, P. T. C. Freire, K. C. V. Lima +3
Single crystal samples of L-leucine, C6H13NO2, a fundamental aliphatic amino acid of the human body, have been studied by Raman spectroscopy at temperatures from 300 to 430 K over…
Raman studies of polycrystalline CaCuTiO under high-pressure
D. Valim, A. G. Souza Filho, P. T. C. Freire +5
We report a Raman scattering study of polycrystalline CaCuTiO (CCTO) under pressure up to 5.32 GPa. The pressure dependence of several Raman modes was investigated.…
Low Temperature Phase Transition in Sr(0.66)Ba(0.34)Nb2O6 single Crystal Fibers
J. L. B. Faria, C. W. A. Paschoal, P. T. C. Freire +5
The structural changes in Sr(0.66)Ba(0.34)Nb2O6 single crystal fibers when the temperature decreases from 295 to 10 K is investigated by dielectric constant measurements and Raman…
A Raman Study of Morphotropic Phase Boundary in PbZr1-xTixO3 at low temperatures
K. C. V. Lima, A. G. Souza, A. P. Ayala +5
Raman spectra of PbZr1-xTixO3 ceramics with titanium concentration varying between 0.40 and 0.60 were measured at 7 K. By observing the concentration-frequency dependence of vibrat…
Electric Field Induced Phase Transition in KDP Crystal Near Curie Point: Raman and X-ray Scattering Studies
A. T. Varela, J. M. Sasaki, I. Guedes +5
X-ray scattering measurements are performed in order to verify % that the mechanism leading to the DC electric field induced phase transition in…
High-pressure Raman study of L-alanine crystal
A. M. R. Teixeira, P. T. C. Freire, A. J. D. Moreno +4
Pressure-dependent Raman scattering studies in the range 0.0 -- 32 kbar were carried out in L-alanine in order to investigate its external mode phonon spectra in relation to the ph…