Scaling behavior of dynamic hysteresis of PMN‐PT relaxor ferroelectric ceramics near the morphotropic phase boundary

Abstract

Due to the feature of domains, ferroelectric materials display hysteresis behavior with respect to the change of the applied electric field. Every ferroelectric material has its own unique hysteresis loop reflecting the information of domain reversal under an electric field. In this work, the scaling behaviors of dynamic hysteresis in relaxor (1-x)Pb(Mg 1/3 Nb 2/3 )O 3 -xPbTiO 3 (PMN-PT) ceramics with different compositions were studied systemically. Our results showed that the evolution of scaling behavior in PMN-PT ceramics can be divided into three stages, which is independent of the phase structure of the ceramics and the testing electric field frequency. The relationship between hysteresis area <A> and field amplitude E 0 obeys the power law <A>∝ f E 0 in the low and high E 0 regions, where the reorientations of 180° and non-180° domain are dominant, respectively. However, the dynamic hysteresis area <A> does not follow the power law in the intermediate E 0 regions, which is attributed to the interaction of different domain reversal mechanisms. Furthermore, the hysteresis area <A> decreases gradually with increasing frequency at a certain E 0 and the time-dependent domain reversal process was also discussed. K E Y W O R D S domain reversal, dynamic hysteresis, ferroelectric ceramics, scaling behavior | 2695 XIA et Al. How to cite this article: Xia X, Li C, Zeng J, Zheng L, Li G. Scaling behavior of dynamic hysteresis of PMN-PT relaxor ferroelectric ceramics near the morphotropic phase boundary. J Am Ceram Soc.

Supercritical Relaxor Nanograined Ferroelectrics for Ultrahigh‐Energy‐Storage Capacitors

“…The rapid increase of polarization can be attributed to the field induced transformation from the relaxor FE state to the long-range FE state, which is accompanied by the different polarization response including domain growth and switching. [46][47][48] This leads to the large α value due to large polarization hysteresis. By comparison, the second stage should be dominated by the induction polarization since the polarization is nearly saturated, leading to a relatively low polarization hysteresis and thus a low α value.…”

Elimination of pyrochlore phase in high‐concentration Sm3+‐doped PMN‐PT piezoelectric ceramics by excessive MgO

“…As mentioned before, T c of PMN‐29PT:3‐5Sm ceramics with the pyrochlore phase is closer to the room temperature, which means that long‐range ferroelectric domains of these ceramics begin to degrade at a lower temperature 31 . The hysteresis loop can reflect the domain reversal process, and the area of the hysteresis loop corresponds to the energy dissipation during the domain reversal process 32 . Therefore, the degradation of long‐range ferroelectric domains weakens the domain reversal and makes the hysteresis loop narrow.…”

“…31 The hysteresis loop can reflect the domain reversal process, and the area of the hysteresis loop corresponds to the energy dissipation during the domain reversal process. 32 Therefore, the degradation of longrange ferroelectric domains weakens the domain reversal and makes the hysteresis loop narrow. Table 1 shows the electromechanical properties of PMN-29PT:0-5Sm ceramics with the pure perovskite phase and PMN-29PT:3-5Sm ceramics with the pyrochlore phase.…”

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“…Figure a shows the temperature-dependent ε r and tan δ of the PBZTNB- x Cd ceramics. All compositions show a broad dielectric peak at the maximum ε r , and the temperature of the maximum ε r (marked as T m ) shifts to higher temperatures with increasing frequency (Figures S4 and S5), indicating a relaxor characteristic . Interestingly, increasing the CdCO 3 content negligibly affects the T m of the PBZTNB- x Cd ceramics (Figure a).…”