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Original Articles

Structural stability of multiferroic BiFeO3

, , , , , , , & show all
Pages 265-272 | Published online: 02 Jun 2010
 

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.

Acknowledgements

This work was sponsored by the Ministry of Sciences and Technology of China.

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