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Frequency dependent current response of an idealized ferroelectric capacitor (simulation). Since the time integral over the current peak corresponds to the polarization charge and the time window, in which the applied voltage is sufficiently high to switch the polarization (here between and ), reciprocally scales with the frequency, the switching current has to increase linearly with frequency. Furthermore, a slight increase of with frequency is found experimentally.
Current response in reply to a triangle voltage excitation of a leaky ferroelectric thin-film capacitor (dashed line) at and compensated current response calculated from the difference of two curves obtained at 100 and (full line).
Uncompensated and dynamic leakage current compensated hysteresis curve of a leaky ferroelectric thin-film capacitor. As shown, both remnant polarization and coercive voltage may not reflect the real ferroelectric behavior of the material in the presence of leakage currents.
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