Dynamic hysteresis of tetragonal ferroelectrics: The resonance of 90° -domain switching

摘要

The dynamic hysteresis of ferroelectric lattice with 90°-domain structure in response to time-varying electric field of frequency ω and amplitude E_O is investigated using Monte Carlo simulation based on the Ginzburg-Landau phenomenological theory. A resonance mode of the polarization switching at low frequency range, associated with cluster dipole switching, beside the dipole switching resonance mode, is revealed, characterized by two separate peaks in the hysteresis area spectrum A(ω). It is indicated that the power law scaling behaviors A(ω) ~ω~α for ω→ O and A(ω) ~ ω~(-β) for ω→∞ remain applicable.