Abstract
The ferroelectric (FE) hysteresis behavior of solid state synthesized 72.5Bi0.5Na0.5TiO3-22.5Bi0.5K0.5TiO3–5BiMg0.5Ti0.5O3 ceramics were studied at different electric field amplitudes (E0) and temperatures (T). The three-stage dynamic behavior was identified on the basis of hysteresis shape in different E0 regions (stage I: 0 <E0 < 8.7 kV/cm, stage II: 8.7 <E0 < 39.2 kV/cm, stage III: 39.2 <E0 < 68 kV/cm). The variation in electro-strain (S) with E0 also support the same and indicates a correlation between S and polarization (P), which was further confirmed by dS/dP vs E0 and S vs P2 plot. The T dependent FE and electro-strain loops was investigated at 55 kV/cm in 25 °C–180 °C. On the basis of its hysteresis shape, the FE loops were grouped into three T regimes, i.e., (i) 25 °C–70 °C (ii) 80 °C–120 °C and (iii) 130 °C–180 °C.
Published Version
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