Temperature-dependent anhysteretic behavior of co-doped PZT

Abstract

The anhysteretic behavior of a soft Pb(Zr,Ti)O 3 was measured from 25 C to 175 C. The experimental determination of the anhysteretic polarization curve, combined with classical P-E and S-E loop measurements, allows for an experimental separation of the reversible and dissipative contributions to the ferroelectric behavior. This approach offers insight into the different mechanisms originating at the microscopic scale and the contribution to the macroscopic ferroelectric properties. It was found that the reversible anhysteretic susceptibility v a of the unpoled material increases by 30% from room temperature to 150 C. On the other hand, the effect on the total susceptibility for a null polarization v c increases only by 17% over the same temperature range. Since the difference between v a and v c reflects the dissipative contribution to the macroscopic ferroelectric behavior, this reveals that dissipation reduces the improvement of susceptibility under increasing temperature. This work illustrates the benefits of separating experimentally the reversible and dissipative contributions to describe the ferroelectric behavior, which can serve as a basis for advanced modeling approaches.

Anhysteretic strains in ferroelectric ceramics under electromechanical loading

“…The remnant electric field amplitude targeted after N cycles is set as 2.23% of E A . The parameters f, k, E A and N were set according to the procedure described in [27]. The obtained values are f = 0.5 Hz, k = 0.015, E A = 4 kV mm −1 and N = 69.…”

“…The center of the P-E loop is used as a new polarization reference, by removing the quantity (P max + P min )/2. It also helps in compensating the possible polarization drift [27] that may have occurred from steps one to three.…”

“…It was recently shown that it could be also successfully applied to ferroelectrics [20]. Anhysteretic behavior has for instance been used for the study of temperature effect on reversible and non-reversible contributions in PZT [27]. In this paper a similar approach is applied for the first time to determine anhysteretic strains in ferroelectric materials.…”