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Why do antiferroelectrics show higher fatigue resistance than ferroelectrics under bipolar electrical cycling?

2009; American Institute of Physics; Volume: 94; Issue: 7 Linguagem: Inglês

10.1063/1.3082375

1520-8842

Xiaojie Lou,

Ferroelectric and Negative Capacitance Devices

We show that our fatigue model developed recently for ferroelectrics could explain why antiferroelectrics show higher fatigue resistance than ferroelectrics under bipolar electrical cycling. The better fatigue endurance of antiferroelectrics in comparison with their ferroelectric counterparts originates from their lower depolarization field, their lower local injected power density, and consequently their lower local phase decomposition probability at the phase nucleation sites. The model, which could explain the fact that unipolar pulses will produce no or little fatigue in ferroelectrics, predicts that evident fatigue will occur in at least one of the two hysteretic branches of antiferroelectrics under unipolar electrical cycling.