Journal
APPLIED PHYSICS LETTERS
Volume 94, Issue 14, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3115765
Keywords
Brillouin spectra; dielectric polarisation; dielectric relaxation; ferroelectric Curie temperature; ferroelectric transitions; lead compounds; order-disorder transformations; relaxor ferroelectrics; soft modes
Categories
Funding
- MEXT, Japan
- Office of Naval Research [N0001402-1-0506, N00014-06-1-0166]
- Carnegie/Department of Energy Alliance Center (CDAC) [DE-FC03-03NA00144]
- [16204032]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [805056] Funding Source: National Science Foundation
Ask authors/readers for more resources
Brillouin spectroscopy of Pb(Sc0.5Nb0.5)O-3 single crystals reveals an order-disorder ferroelectric phase transition occurs at 110 degrees C upon cooling. A softening of the longitudinal acoustic (LA) mode is observed that can be attributed to the coupling between polar nanoregions and acoustic modes. A critical slowing down of the central peak, a feature of order-disorder ferroelectric phase transitions, is observed near T-c. The similarity in temperature dependences of the two kinds of relaxation times determined from the central peak and LA mode suggests that the changes in the central peak arise from local polarization fluctuations in the polar nanoregions.
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
Share Paper
