Central mode and soft mode behavior in PbMg1/Nb2/3O3 relaxor ferroelectric

  title={Central mode and soft mode behavior in PbMg1/Nb2/3O3 relaxor ferroelectric},
  author={Stanislav Kamba and Martin Kempa and Viktor Bovtun and Jan Petzelt and Kyle S. Brinkman and Nava Setter},
The relaxor ferroelectric PbMg1/Nb2/3O3 was investigated by means of broad-band dielectric and Fourier Transform Infrared (FTIR) transmission spectroscopy in the frequency range from 1 MHz to 15 THz at temperatures between 20 and 900 K using PMN films on infrared transparent sapphire substrates. While thin film relaxors display reduced dielectric permittivity at low frequencies, their high frequency intrinsic or lattice response is shown to be the same as single crystal/ceramic specemins. It… 
23 Citations
Dielectric relaxation and polar phonon softening in relaxor ferroelectric PbMg1/3Ta2/3O3
Relaxor ferroelectric PbMg1/3Ta2/3O3 ceramics and thin films were investigated by means of broad-band dielectric, time-domain terahertz (THz), and Fourier-transform infrared (IR) spectroscopy in the
Far-infrared and dielectric spectroscopy of relaxor ferroelectric (Pb1−xLax)(Zr0.4Ti0.6)O3
The dielectric behavior of tetragonal (Pb1−xLax)(Zr0.4Ti0.6)O3 (PLZT x∕40∕60) ceramics doped with lanthanum (x=12% and 15%) has been investigated from 102to1014Hz in the temperature range of 20–800K.
Broadband dielectric spectra in PbMg1/3Nb2/3O3 crystals with chemical order modified by La doping
PbMg1/3Nb2/3O3 (PMN) is a well known ferroelectric relaxor. PMN crystal doped with La3+ has greatly enlarged chemically ordered regions (CORs) in the structure. It is interesting to know how the
The effect of chemical variations on the structural polarity of relaxor ferroelectrics studied by resonance Raman spectroscopy.
Results show that A-site doping has significantly stronger effect on the structural polarity than the introduction of a third element at the B site (Nb(5+) or Sn(4+) doped in PbSc0.5O3).
Soft-mode spectroscopy of ferroelectrics and multiferroics: A review
  • S. Kamba
  • Materials Science, Chemistry
  • 2021
This article summarizes the results of the investigations of the dynamics of ferroelectric (FE) phase transitions (PTs) obtained in Prague during the last 25 years. After a short introduction,
Anisotropic dielectric function in polar nanoregions of relaxor ferroelectrics.
The Letter suggests treating the infrared reflectivity spectra of single crystal perovskite relaxors as fine-grained ferroelectric ceramics as a general guide for systematic determination of the polar mode frequencies split by the inhomogeneous polarization at the nanometer scale.
Polarization behavior in diffuse phase transition of BaxSr1-xTiO3 ceramics
Ultrawide band dielectric spectroscopy analysis of barium strontium titanate [BaxSr1−xTiO3 (BST)] ceramics at different temperatures disclosed a contribution of the dipole and the ionic polarizations
The Impact of chemical ordering on the dielectric properties of lead scandium tantalate Pb(Sc1∕2Ta1∕2)O3 thin films
The impact of chemical ordering on the dielectric properties of the thin film relaxor Pb(Sc1∕2Ta1∕2)O3 (PST) was investigated. It was found that the dielectric permittivity increased with increased B
Dynamics of nonlinear dielectric susceptibility of ferroelectrics near the morphotropic phase boundary
The dynamics of the nonlinear (NL) dielectric susceptibility of ferroelectrics (FE) near the morphotropic phase boundary (MPB) is theoretically investigated based on the Landau–Devonshire free energy