Abstract
Abstract Polarization reversal in ferroelectrics causes strong dielectric nonlinearities. These nonlinearities are used to realize nonlinear dynamical systems, e. g. a nonlinear series resonance circuit. This circuit consists of a linear inductance and a ferroelectric capacitance. Depending on external parameters (e. g. amplitude and frequency of the driving voltage or temperature of the ferroelectric material) it is possible to tune the system to dynamical instabilities, such as period-doubling or symmetry-breaking bifurcations up to chaos. Near these instabilities the system can act to amplify small signals of suitably chosen frequencies. This work presents experimental results of a series resonance circuit containing TGS as ferroelectric. The effect of small signal amplification is investigated for different kinds of dynamical instabilities. The presented results are in good agreement with theoretical predictions.
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