Journal
PHASE TRANSITIONS
Volume 81, Issue 11-12, Pages 987-998Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/01411590802457771
Keywords
ferroelectric relaxors; lead scandium tantalite; dielectric response; hydrostatic pressure
Categories
Funding
- Polish Committee of Scientific Research [1 P03B 110 27]
Ask authors/readers for more resources
The effect of hydrostatic pressure on the dielectric response of Pb(Sc1/2Ta1/2)O3 single crystal with the degree of order S = 0.16 has been studied. At elevated pressures the dielectric anomaly characteristic of ferroelectric relaxors is shifted to lower temperatures, its amplitude decreases and the relaxor peak becomes more diffused. In the pressure range studied up to 0.75 GPa, the temperature dependencies of the characteristic relaxation time obey the Vogel-Fulcher law. It has been found that the Vogel-Fulcher temperature decreases with increasing pressure while the activation energy of the dipolar entities increases. This increase can be ascribed to the pressure-induced changes in the atom-atom and dipolar interactions, resulting in the increased energy barriers for dipolar fluctuations.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available