| X-ray diffraction and ferroelectric study on temperature dependence of BiFeO3 function material |
| Paper ID : 1126-ISCHU |
| Authors |
|
Rana Ahmed Sayed * German University in Cairo (GUC)
Helwan University |
| Abstract |
| Bismuth Ferrite ( BiFeO3 or BFO ) is one of the very promising multiferroics. Due to its high antiferromagnetic Néel temperature of TN ~ 623 K – 643 K and high ferroelectric Curie temperature of TC ~ 1083 K – 1103 K, it could be optimized to exhibit a magnetoelectric effect even at room temperature. This work studies the effect of temperature on the crystal and physical properties of BiFeO3. Crystallographic characteristics ( unit cell type and dimensions ) will be studied using X-ray powder diffraction and Rietveld refinement. Ferroelectric property will be studied using Sawyer-Tower Circuit ( consisting of a sine wave function generator, 2 capacitors; one is BFO sample and the other a reference capacitor and an oscilloscope with data storage ability) by plotting the electrical field with respect to polarization ( P-E hysteresis loop ). The obtained X-ray diffractograms and measured electrical hysteresis loop showed the presence of ferroelectric ( rhombohedral R3c ) phase. |
| Keywords |
| Bismuth Ferrite, XRD, Crystallographic study, Rietveld refinement, Sawyer-Tower Circuit, Electrical hysteresis loop. |
| Status: Abstract Accepted (Oral Presentation) |