Brillouin and dielectric studies of the phase transition in the relaxor ferroelectric Pb(Ni1/3Nb2/3)O3

Abstract

Effects of the surface charge screening and temperature on the vortex domain patterns of ferroelectric nanodots J. Appl. Phys. 112, 104108 (2012) Unusual Urbach tail in TlGaSe2 ferroelectric-semiconductor with incommensurate phase J. Appl. Phys. 112, 103106 (2012) Dielectric and polarized Raman spectroscopic studies on 0.85Pb(Zn1/3Nb2/3)O3-0.15PbTiO3 single crystal J. Appl. Phys. 112, 073521 (2012) Structural change in polar nanoregion in alkali niobate added Pb(Zn1/3Nb2/3)0.95Ti0.05O3 single crystal and its effect on ferroelectric properties J. Appl. Phys. 112, 074109 (2012) Enhanced piezoelectric and antiferroelectric properties of high-TC perovskite of Zr-substituted Bi(Mg1/2Ti1/2)O3-PbTiO3 J. Appl. Phys. 112, 074101 (2012) Additional information on J. Appl. Phys.

Broadband inelastic light scattering of a relaxor ferroelectric 0.71Pb(Ni1∕3Nb2∕3)O3-0.29PbTiO3

“…The distribution of switching times of dipoles causes the distribution of relaxation time. 18 Compared with the real part of the dielectric constant of PNN, 11 it can be seen that PT enhances its dielectric property and makes the diffuseness and the frequency dispersion of the phase transition smaller. T m was obtained at each frequency as 307.0 K at 100 kHz, 309.1 K at 10 kHz, 311.1 K at 1 kHz, and 313.8 K at 100 Hz.…”

“…16 In the frequency range from megahertz to terahertz in relaxor ferroelectrics, the reasonable origin of CP is the fluctuation of polarization related to the existence of polar nanoregion ͑PNR͒. [10][11][12][13][14][15] Although PNR has been thought to play an important role in controling the unique properties of relaxor ferroelectrics, the dynamical property of PNR has not been fully understood. In this letter, we report the broadband inelastic light scattering by the combination of Brillouin and Raman spectra of a 0.71PNN-0.29PT single crystal with near the MPB composition ͓ϳ0.32PT ͑Refs.…”

“…[9][10][11][12][13][14][15] The CPs show marked temperature dependences in both width and intensity, and various kinds of mechanisms were proposed for CPs. 16 In the frequency range from megahertz to terahertz in relaxor ferroelectrics, the reasonable origin of CP is the fluctuation of polarization related to the existence of polar nanoregion ͑PNR͒.…”

“…As usual, CP is analyzed by a Lorentzian function centered at zero frequency shift assuming a single relaxation. [10][11][12]14,15 Independent damped harmonic oscillators ͑DHOs͒ were used for all the phonon modes. 14,15 In the broadband spectra, it is necessary to analyze using two Lorentzians, which correspond to two relaxation processes related to PNRs.…”

Inelastic light scattering studies of diffuse phase transition in ferroelectric Sr1.9Ca0.1NaNb5O15 thin films

“…4(b) for T > T m , values of H 0 and T B were determined from Eqn (4) to be 2939 and 385 • C, respectively. Though there are no related data on H 0 and T B for SCNN in the literature, our findings are reasonable and are [16,18] T B is an important parameter in investigating the phase transition properties of diffuse materials. In order to further confirm our results on H 0 and T B , we investigated the temperature dependence of the refractive index (n) and dielectric permittivity for our samples.…”