Electrical studies of Barkhausen switching noise in ferroelectric PZT: Critical exponents and temperature dependence

Abstract

Crackling noise of ferroelectric lead zirconate titanate (PZT) samples during ferroelectric switching is demonstrated to be compatible with avalanche statistics. The peaks of the slew-rate (time derivative of current dI/dt squared), defined as "jerks", were statistically analyzed and shown to obey power-laws. The critical exponent obtained is 1.64±0.15, in agreement with predictions from avalanche theory. The exponent is independent of temperature within experimental error margins. I.

Electrical studies of Barkhausen switching noise in ferroelectric lead zirconate titanate (PZT) and BaTiO3: critical exponents and temperature-dependence

“…Although we have presented some data [4] on energy exponents in PZT previously, we extend those here in Table II and Figs. 4 and 5.…”

“…The model predicts the critical exponents of slip avalanches with a broad distribution of sizes (energy/amplitude of the jerks) [27]. There have been several notable experimental studies that have validated this model [4,7,22,37,38].…”

“…Earlier studies of Barkhausen noise in ferroelectrics [7,[39][40][41]] emphasised a few well-known materials; a full listing is given in Table I. The specimens used in the present experiments were described in earlier papers. [4,7] Three ceramic PZT specimens were examined, emphasising a commercial lead zirconate titanate (referred to as PZT throughout) from PI Ceramic Lederhose, Germany [42], labelled PIC255 by the manufacturer, and one single-crystal barium titanate sample. In addition BaTiO 3 ceramics were prepared that were Fe-doped.…”

Electric-field-induced avalanches and glassiness of mobile ferroelastic twin domains in cryogenic SrTiO3

“…This scenario is captured by the "field-integrated" mean-field exponent 1.6 [23]. This value was previously observed for switching in BaTiO 3 [2], lead zirconate titanate (PZT) [39], and in stress-induced switching in ferroelastics [11,12]. The most important example is probably LaAlO 3 [9,10] where the switching exponents were measured under simultaneous observation of the needle progression.…”

Avalanches in ferroelectric, ferroelastic and coelastic materials: phase transition, domain switching and propagation

“…Instead, the optimal rate must be chosen such that overlap of avalanches is small (low rates) and jumps large enough to be detected (high rates). A detailed statistical analysis of jumps in displacement current has been performed during the application of a triangular electric field at 40-60 V s À1 to two commercial Pb(Zr,Ti)O 3 samples [51]. The statistical analysis is performed on the square of the first-time derivative of the current, i.e.…”