Abstract
The scaling behavior of sub-coercive field dynamic ferroelectric hysteresisunder the influence of stress was investigated in rhombohedral0.6Pb(Zr0.5Ti0.5)O3–0.4Pb(Zn1/3Nb2/3)O3 (0.6PZT–0.4PZN) bulk ceramic. The scaling relation of hysteresis area against frequency f, field amplitude E0, and stress σ for the minor loops takes the form of , indicating the difference in the energy dissipation between the stressedand stress-free conditions. While the scaling obtained is very similarto that of soft and hard PZT ceramics, slightly faster responses tof andE0 indicate the ease of polarization orientation in this ceramic with a simpler domain structurecompared to commercial PZT ceramics. However, the difference in mechanical properties ofthese materials could contribute to a variation in the response to stress. While theE0 exponent obtained in this study agreed well with that derived from the MonteCarlo simulation based on the Q-state planar Potts model, the difference in thef exponent obtained experimentally and theoretically was attributed to the depolarizingeffects presented in the bulk ceramics.
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