Simulation and Experimental Data of P-E Hysteresis Loop in BNT and BKT
- 1 Physics Department, College of Science, Al-Nahrain University, Baghdad, Iraq
- 2 Physics Department, College of Science, Al-Nahrain University, Baghdad, Iraq
Abstract
Hysteresis loop measurements performed both experimentally for Bismuth Sodium Titanate (BNT) and Bismuth Potassium Titanate (BKT) samples using modified Sawyer-Tower Circuit. The experiment showed that the P-E hysteresis had main parameters for BNT, remnant polarization ( P r = 27 μC/cm2), spontaneous polarization ( P s = 35 μ C/cm 2 ) and coercive electric field ( E c = 60 kV/cm) and for BKT the remnant polarization was ( P r = 5.2 μ C/cm 2 ), spontaneous polarization ( P s = 30 μ C/cm 2 ) and coercive electric field ( E c = 4.72 kV/cm). These three parameters (remnant polarization, spontaneous polarization, coercive electric field) were used in a simulated software depending on the mathematical model for the polarization in ferroelectric materials. The simulation software predicted the value of applied electric field required to perform the P-E hysteresis experiment varying with P r , P s , E c . The results of the simulation exhibited agreement with the experimental data. The last prediction could help the researchers in studying the ferroelectric hysteresis loop, especially for those studying a fatigue behaviour or studying the effect of electric field cycle on the hysteresis loop.
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