Anomalous elastic behavior of relaxor ferroelectric Ca0.28Ba0.72Nb2O6:Ce studied by resonant ultrasound spectroscopy
- 19 December 2011
- journal article
- conference paper
- Published by AIP Publishing in Applied Physics Letters
- Vol. 99 (25) , 252901
Abstract
Elastic behavior of tetragonal tungsten bronze uniaxial relaxor ferroelectric cerium doped Ca0.28Ba0.72Nb2O6 single crystal was investigated employing resonant ultrasound spectroscopy in the temperature range from room temperature up to 1323 K. Doping of cerium lowers the phase transition temperature Tc and Burns temperature Tb significantly, however, intermediate characteristic temperature T* (between the Burns temperature Tb and the temperature of maximum dielectric permittivity Tm) remains same as for pure Ca0.28Ba0.72Nb2O6. All independent elastic constants evolved differently with temperature, reflecting their coupling to different types of the reorientational motion of the polar nanoregions through their interaction with the acoustic waves.Keywords
This publication has 24 references indexed in Scilit:
- Intermediate temperature scalein lead-based relaxor systemsPhysical Review B, 2009
- Resonant ultrasound spectroscopy offerroelectric relaxor crystalsPhysical Review B, 2008
- Central peaks, acoustic modes, and the dynamics of polar nanoregions in single crystals studied by Brillouin spectroscopyPhysical Review B, 2008
- Structural properties ofin the temperature rangeinvestigated by high-resolution neutron powder diffraction and specific heat measurementsPhysical Review B, 2006
- Specific-Heat Anomaly Caused by Ferroelectric Nanoregions in and RelaxorsPhysical Review Letters, 2003
- Temporal development of photorefractive solitons up to telecommunication wavelengths in strontium-barium niobate waveguidesPhysical Review E, 2001
- Glassy polarization behavior of relaxor ferroelectricsPhysical Review B, 1992
- Anomaly of hypersound velocity in the vicinity of a “diffuse phase transition” in PbMg1/3Nb2/3O3and PbMg1/3Ta2/3O3Ferroelectrics, 1989
- Relaxor ferroelectricsFerroelectrics, 1987
- Measurements of strain and the optical indices in the ferroelectric : Polarization effectsPhysical Review B, 1987