Structural stability of multiferroic BiFeO3
Abstract
Multiferroic BiFeO3 was fabricated via a high pressure of 5 GPa at 900 °C. The crystal structure of the BiFeO3 ceramic was determined by X-ray diffraction (XRD) to be a rhombohedral perovskite with a space group of R3c. The temperature dependence of XRDs was collected down to 5 K under ambient pressure that showed no structure phase transition. The structural evolution of BiFeO3 under high pressures up to 56.6 GPa was studied at room temperature using a diamond anvil cell combined with synchrotron radiation XRD. A possible phase transition was proposed at around 10 GPa. The bulk modulus was estimated to be B 0=97.3(7) GPa in the low-pressure range.
- Publication:
-
High Pressure Research
- Pub Date:
- June 2010
- DOI:
- 10.1080/08957959.2010.493670
- Bibcode:
- 2010HPR....30..265Z
- Keywords:
-
- multiferroics;
- BiFeO<SUB>3</SUB> perovskite;
- synchrotron radiation;
- equation of state