Issue |
EPL
Volume 98, Number 2, April 2012
|
|
---|---|---|
Article Number | 27008 | |
Number of page(s) | 6 | |
Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
DOI | https://doi.org/10.1209/0295-5075/98/27008 | |
Published online | 30 April 2012 |
Large piezoelectricity and dielectric permittivity in BaTiO3-xBaSnO3 system: The role of phase coexisting
1
Multi-disciplinary Materials Research Center, Frontier Institute of Science and Technology,
Xian Jiaotong University - Xi'an 710049, China
2
Ferroic Physics Group, National Institute for Materials Science - Tsukuba 305-0047, Ibaraki, Japan
a
yaodongy@mail.xjtu.edu.cn
b
ren.xiaobing@mail.xjtu.edu.cn
Received:
17
February
2012
Accepted:
26
March
2012
We report ultrahigh dielectric and piezoelectric properties in BaTiO3-xBaSnO3 ceramics at its quasi-quadruple point, a point where four phases (Cubic-Tetragonal-Orthorhombic- Rhombohedral) nearly coexist together in the temperature-composition phase diagram. At this point, dielectric permittivity reaches ∼75000, a 6–7-fold increase compared with that of pure BaTiO3 at its Curie point; the piezoelectric coefficient d33 reaches 697 pC/N, 5 times higher than that of pure BaTiO3. Also, a quasi-quadruple point system exhibits double morphotropic phase boundaries, which can be used to reduce the temperature and composition sensitivity of its high piezoelectric properties. A Landau-Devonshire model shows that four-phase coexisting leading to minimizing energy barriers for both polarization rotation and extension might be the origin of giant dielectric and piezoelectric properties around this point.
PACS: 77.22.-d – Dielectric properties of solids and liquids / 77.65.Bn – Piezoelectric and electrostrictive constants
© EPLA, 2012
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.