Low-temperature switching fatigue behavior of ferroelectric SrBi2Ta2O9 thin films

Abstract

Articles you may be interested inTemperature-dependent fatigue behaviors of ferroelectric ABO 3 -type and layered perovskite oxide thin films

The unusual temperature dependence of the switching behavior in a ferroelectric single crystal with dislocations

“…Similar unusual phenomena have also been reported in recent decades [13][14][15][16]. Although some papers have tried to explain the unusual phenomena by the kinetic effect [11], electrical defects [13][14][15], and leakage current [16], a direct observation has not been reported yet. In this work, the effect of mechanical defects (dislocations) on the unusual temperature-dependent behavior is explored by phase field simulation.…”

“…The underlying mechanism that leads to the improved piezoresponse by increasing temperature is not clear. Similar unusual phenomena have also been reported in recent decades [13][14][15][16]. Although some papers have tried to explain the unusual phenomena by the kinetic effect [11], electrical defects [13][14][15], and leakage current [16], a direct observation has not been reported yet.…”

“…In other words, this work provides an alternative microstructural explanation of the related experimental results. Although the unusual temperature dependence of the remnant polarization and coercive field has been widely reported [11][12][13][14][15][16], direct observation of the microscopic mechanism has rarely been reported. The present phase field simulations show that the existence of dislocation arrays in ferroelectrics is one of the reasons for the unusual phenomenon.…”

Nonlinear Phenomena in Multiferroic Nanocapacitors: Joule Heating and Electromechanical Effects

“…38 In turn, the more symmetric shape of the hysteresis loops can appear due to thermally assisted switching. 39,40 In fact, it is well-established that higher temperatures lead to smaller coercive voltages in ferroelectric films and accelerate their back-switching. Therefore, the measured local switching behavior depends on local thermal behavior and leakage current level.…”

“…The higher amplitude characteristic of highly leaky capacitors in both mono- and multidomain states can originate from thermal expansion of BFO thin films due to Joule heating . In turn, the more symmetric shape of the hysteresis loops can appear due to thermally assisted switching. , In fact, it is well-established that higher temperatures lead to smaller coercive voltages in ferroelectric films and accelerate their back-switching. Therefore, the measured local switching behavior depends on local thermal behavior and leakage current level.…”