Ferroelectricity in the Compound Ba2Bi4Ti5O18
Abstract
Some ferroelectric and crystallographical properties of the compound Ba2Bi4Ti5O18 are presented. The compound represents a new structure with the unit cell consisting of one Bi2O2+2 layer and five perovskite layers. From -196° to +580°C, a maximum in the real part of the dielectric constant was observed at 329°C. No thermal hysteresis was observed within the precision of +/-2°C. A remanent polarization of 2×10-6 coul/cm2 and a coercive field of 10 kv/cm were observed at room temperature.
- Publication:
-
Physical Review
- Pub Date:
- May 1962
- DOI:
- 10.1103/PhysRev.126.893
- Bibcode:
- 1962PhRv..126..893A