Asymmetry in fatigue and recovery in ferroelectric Pb(Zr,Ti)O3 thin-film capacitors
B. G. Chae, C. H. Park, Y. S. Yang, and M. S. Jang
TL;DR
This study explores the asymmetric fatigue and recovery behaviors in ferroelectric Pb(Zr,Ti)O3 thin-film capacitors, revealing that negative voltages can refresh fatigue while positive voltages cannot, and that asymmetric driving prevents fatigue.
Contribution
It uncovers the asymmetric nature of fatigue and refreshment in ferroelectric capacitors and demonstrates how asymmetric driving can prevent fatigue.
Findings
Negative high dc-voltage refreshes fatigued capacitors.
Positive dc-voltage does not refresh fatigue.
Asymmetric driving prevents fatigue.
Abstract
We investigate the fatigue and refreshment by dc-electrical field of the electrical properties of Pt/Pb(Ti,Zr)O/Pt ferroelectric capacitors. We find an asymmetry in the refreshment, that is, the fatigued state can be refreshed by application of negative high dc-voltage to the top electrode, but no refreshment is measured by positive dc-voltage application. We also find that the fatigue can be prevented by driving the capacitor asymmetrically.
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