Abstract
Fatigue is the characteristic of ferroelectrics that the amount of charge q that is switched with repetitive bipolar applied voltages decreases with cycling. This is usually described as a decrease in remanent polarization P r (N) with switching cycles N. However, in reality the polarization per primitive crystallographic unit cell remains unchanged with N. Instead, the number of cells and domains that switch decreases slowly with increasing N, as domain walls become pinned. This pinning can occur at grain boundaries, at surfaces, or at other defect sites, particularly extended defects.KeywordsOxygen VacancyDomain WallSchottky Barrier HeightCharge InjectionFatigue MechanismThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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