A Compact Model of Double Hysteresis Loop for Antiferroelectric Capacitor

We propose a compact model of a double hysteresis loop for antiferroelectric (AFE) capacitors by considering the interaction between mechanical stress and ferroelastic switching. By adopting the nucleation-limited switching (NLS) theory, we develop a Monte Carlo simulation framework. Calibrated with experimental data, the parameters for polarization reversal could be extracted, and the model could be used to reproduce the dynamic response under a major/minor loop; furthermore, the model can successfully describe the frequency dependence of the AFE capacitor and the experimentally measured turning points and trajectories of minor loops. Based on the proposed model, we further discuss the wake-up and endurance mechanism for the TiN/Hf0.25Zr0.75O2/TiN capacitor.