Ferroelectric Switching Dynamics and Pulse-Switching Polarization Measurements

摘要

Pulse switching properties were studied in poly crystalline Pb(Zr,Ti)O_3 capacitors to check a recently proposed nucleation limited switching (NLS) model, where very wide switching was observed. The backing-switching responses (P_b) at the end of writing pulses were studied to understand the role of writing pulse together with switching polarization (AP). The P_b + DELTA P, with high enough write voltage, is almost independent of writing pulse width (t_w), even though AP is observed to increase with increasing t_w. From these results, it is concluded that the NLS dynamics are attributed to the switching and poling processes with external fields around coercive fields.