Journal
JOURNAL OF APPLIED PHYSICS
Volume 107, Issue 7, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3369278
Keywords
-
Categories
Funding
- Office of Naval Research [N00014-02-1-0506, N00014-06-10166, N00014-07-1-0451]
- Carnegie/DOE Alliance Center (CDAC) [DE-FC03-03NA00144]
- U.S. Department of Energy [DE-AC04-94AL85000]
- MEXT, Japan [16204032]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [805056] Funding Source: National Science Foundation
- Grants-in-Aid for Scientific Research [16204032] Funding Source: KAKEN
Ask authors/readers for more resources
High-pressure Brillouin and Raman scattering spectroscopy and x-ray diffraction measurements were carried out on disordered Pb(Sc1/2Nb1/2)O-3, considered to be a model system for phase transitions in relaxor ferroelectrics and related materials. The observed pressure-dependent Raman spectra are unusual, with the relaxor state distinguished by broad Raman bands. Raman spectra as a function of pressure reveal a new peak at 370 cm(-1), with two peaks near 550 cm(-1) merge above 2-3 GPa, indicating a structural phase transition in this pressure range consistent with earlier dielectric measurements. A significant softening in the longitudinal acoustic mode is observed by Brillouin scattering. Both the temperature and pressure dependencies of the linewidth reveal that the longitudinal acoustic mode softening arises from electrostrictive coupling between polar nanoregions and acoustic modes. X-ray diffraction indicates that the pressure-volume compression curve changes near 2 GPa. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3369278]
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