Abstract
The structural, dielectric, and ferroelectric characterization of multiphase Bi-Fe-O prepared with an excess of Bi up to 20% is reported. It is found that the dominant phase in all samples is the BiFeO3 perovskite in addition to an increasing amount of the Bi-rich sillenite phases (Bi12.5Fe0.5O19.48/Bi25FeO39) with the Bi excess content. At room temperature, the multiphase Bi-Fe-O results in advanced electrical properties, with higher dielectric constant (161 at 1 MHz) and low losses (tanδ = 0.032 at 1 MHz). The ferroelectric character of multiphase ceramics is confirmed by PUND measurements, which shows increased polarization values and coercive field with respect to the single phase ceramics.
Original language | English |
---|---|
Article number | 1800584 |
Journal | Physica Status Solidi (A) Applications and Materials Science |
Volume | 216 |
Issue number | 3 |
DOIs | |
Publication status | Published - Feb 6 2019 |
Keywords
- bismuth ferrite
- dielectric characterization
- impurity phases
- multiferroics
- PUND ferroelectric characterization
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Surfaces and Interfaces
- Surfaces, Coatings and Films
- Electrical and Electronic Engineering
- Materials Chemistry