Scaling behavior of dynamic hysteresis in multi-domain spin systems

The dynamic hysteresis in two-dimensional multi-domain spin systems is simulated using Monte-Carlo method based on Q-state planar Potts model. The pattern and scaling property of the hysteresis as a function of the oscillating time-varying external field are studied and compared qualitatively with the experimental data on PZT ferroelectric films and theoretical predictions. While the scaling of the hysteresis area with frequency f and amplitude E-0 of the external field at a form of f(1/3)E(0)(2/3) over the low-f range is well-established, the high-f range scaling relations as derived from the simulation, experiment and theoretical model differ from one and another. (C) 2002 Elsevier Science B.V. All rights reserved.