122 citations · 316 across the 8 of their papers we have counts for
6 papers · 1 filter
Ultrasonic investigation of the interaction hydrogen-dislocations in copper crystals
A. Moreno-Gobbi, G. Zamir, J. A. Eiras
In this paper we present experimental data of ultrasonic velocity and attenuation obtained in a high purity crystalline sample of cooper hydrogenated by gaseous charge. The sample…
Investigation of dielectric anomalies at cryogenic temperatures in the (1-x)[Pb(Mg1/3 Nb2/3)O3]-xPbTiO3 system
M. H. Lente, A. L. Zanin, E. R. M. Andreeta +3
Complex electrical permittivity measurements in (1-x)[Pb(Mg1/3 Nb2/3)O3]-xPbTiO3 ceramics for 0.10 x 0.40 were performed in the frequency and temperature range from 1 kHz to 100 kH…
Investigation of microwave dielectric relaxation process in the antiferroelectric phase of NaNbO3 ceramics
M. H. Lente, J. de Los S. Guerra, J. A. Eiras
This letter reports microwave dielectric measurements performed in the antiferroelectric phase of NaNbO3 ceramics from 100 to 450 K. Remarkable dielectric relaxations were found wi…
90-degree domain wall relaxation and frequency dependence of the coercive field in the ferroelectric switching process
M. H. Lente, A. Picinin, J. P. Rino +1
The mechanisms involved in the polarization switching process in soft and hard Pb(Zr53, Ti47)O3 (PZT) bulk ceramics were investigated through the dependency of the hysteresis loop…
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…
A Raman Investigation of PbZr0.94Ti0.06O3 Ceramics Under High-Pressures
A. G. Souza Filho, P. T. C. Freire, J. M. Sasaki +5
We have investigated the behavior of the PbZr(0.94}Ti(0.06)O3 Raman spectra as a function of Hydrostatic pressures. The new structural phases were identified based on previous work…