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Influence of tetragonal platelets on the dielectric permittivity of0.964Na1/2Bi1/2TiO3−0.036BaTiO3
- Source :
- Physical Review B. 94
- Publication Year :
- 2016
- Publisher :
- American Physical Society (APS), 2016.
-
Abstract
- We study the temperature-dependent evolution of the octahedral tilt order in a lead-free relaxor ferroelectric and its impact on the ferroelectric properties. Using diffuse neutron scattering on a $0.964{\mathrm{Na}}_{1/2}{\mathrm{Bi}}_{1/2}{\mathrm{TiO}}_{3}\text{\ensuremath{-}}0.036{\mathrm{BaTiO}}_{3}$ single crystal, we suggest a model for the temperature-dependent nanostructure of this perovskite that features chemically pinned tetragonal platelets embedded in the rhombohedral matrix, often separated by a cubic intermediate phase. Our results show a clear correlation between the squared thickness of the tetragonal platelets and the dielectric permittivity. This is interpreted as a sign for increased polarizability of the strained and distorted lattice at the center of the tetragonal platelets.
- Subjects :
- 010302 applied physics
Nanostructure
Materials science
Condensed matter physics
02 engineering and technology
Neutron scattering
021001 nanoscience & nanotechnology
01 natural sciences
Ferroelectricity
Condensed Matter::Materials Science
Tetragonal crystal system
Octahedron
Polarizability
Condensed Matter::Superconductivity
Lattice (order)
0103 physical sciences
0210 nano-technology
Single crystal
Subjects
Details
- ISSN :
- 24699969 and 24699950
- Volume :
- 94
- Database :
- OpenAIRE
- Journal :
- Physical Review B
- Accession number :
- edsair.doi...........235dc6c872f468f8032c5b9a7ac26447
- Full Text :
- https://doi.org/10.1103/physrevb.94.014105