Ferroelectricity in Bi4Ti3O12 and its solid solutions

Subbarao , E. C. (1961) Ferroelectricity in Bi4Ti3O12 and its solid solutions Physical Review, 122 (3). pp. 804-807. ISSN 0163-1829

Full text not available from this repository.

Official URL: http://prola.aps.org/abstract/PR/v122/i3/p804_1

Related URL: http://dx.doi.org/10.1103/PhysRev.122.804


On the basis of dielectric studies on polycrystalline specimens, Bi4Ti3O12 has been established as a ferroelectric with a Curie temperature of 675°C. The symmetry is orthorhombic with a = 5.411 A, c = 32.83 A, and b/a = 1.007 at 25°C. A high-temperature x-ray study revealed a symmetry change to tetragonal at 675°C. The polar axis is probably the orthorhombic b axis. Bi4Ti3O12 is a member of oxides with the general formula (Bi2O2)2+(Mex-1Rx O3x+1)2-. According to Aurivillius, the crystal structure of Bi4Ti3O12 comprises a stacking of Bi2O2 and perovskite-like Bi2Ti3O10 layers along the pseudotetragonal c axis. Multiple ion substitutions of (Bi3+Ti4+) in (Bi2O2)2+(Bi2Ti3 O10)2- by (Me2+Nb5+) where Me2+=Ba, Pb, or Sr lead to a steep decrease of the Curie temperature.

Item Type:Article
Source:Copyright of this article belongs to American Physical Society.
ID Code:76300
Deposited On:31 Dec 2011 12:20
Last Modified:31 Dec 2011 12:20

Repository Staff Only: item control page