Extrinsic Peak in the Susceptibility of Incipient Ferroelectric KTa: Li
- 13 November 1978
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 41 (20) , 1410-1413
- https://doi.org/10.1103/physrevlett.41.1410
Abstract
Dielectric-constant measurements on KTa: Li as a function of Li concentration, temperature, and frequency reveal the presence of a peak in the susceptibility near the paraelectric anomaly at 0 K. This effect is attributed to Li impurities which are "frozen" in an off-center position at the potassium site. For samples with a Li concentration of less than 24%, continuity of the elastic compliance ensures that a lattice polarization does not occur as for a true ferroelectric. Our results support the mean-field approach to the dynamics of impurities in ferroelectric hosts.
Keywords
This publication has 6 references indexed in Scilit:
- Statics and dynamics of ?soft? impurities in a crystalZeitschrift für Physik B Condensed Matter, 1977
- Coupling to Lateral Proton Configurations in KAsPhysical Review Letters, 1977
- Defects and the central peak near structural phase transitionsPhysical Review B, 1976
- Differential Raman scattering from impurity soft modes in mixed crystals of K1−xNaxTaO3 and K1−xLixTaO3Solid State Communications, 1974
- Critical behaviour of SrTiO3 near the 105°K phase transitionSolid State Communications, 1971
- Electromechanical Behavior of Single Crystals of Barium Titanate from 25 to 160°CJournal of Applied Physics, 1959