20-21 November 2014
National Centre for Synchrotron Science
Australia/Melbourne timezone
Save the date: User Meeting 2015 - 26-27 November

In situ high-energy x-ray diffraction study on bulk bismuth ferrite ceramic

20 Nov 2014, 17:30
1h 30m
NCSS Exhibition Area ()

NCSS Exhibition Area

Australian Synchrotron 800 Blackburn Road Clayton VIC 3168
Board: 106


Mr Neamul Khansur (UNSW)


Bismuth ferrite, BiFeO3 (BF) is a multiferroic ceramic familiar for the existence of both strong ferroelectric and magnetic ordering at room temperature. In addition to the multiferroicity, the remarkably high Curie temperature (Tc ) and spontaneous polarization (Ps ) of BF has made it an attractive candidate to replace lead-based Pb(Zr,Ti)O3 for industrial applications. However, the high coercive field (> 10 kV.mm-1 ) and related poling inefficiency is the major issue for the application of BF as a piezoelectric material. To tailor the actuator property of bulk BF ceramic, it is essential to understand the structure-property relationship in the ceramic at field-on condition. In situ high-energy x-ray diffraction measurements with a large area detector in transmission geometry can be utilized to quantify the structural variation with field in these materials. Here, we used the high-energy x-ray diffraction beamline I12-JEEP of the Diamond Light Source, UK. Qualitative and quantitative analysis of diffraction patterns reveal that ferroelastic domain switching is the primary mechanism for the strain response. Interestingly, a strain magnitude similar to thin film BF was observed; however, the origin of strain response is different.

Primary author


John Daniels (UNSW) Dr Justin Kimpton (Australian Synchrotron)

Presentation Materials

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