Analysis of switching process in (CH₃NH₃)₅Bi₂Br₁₁single crystals based on the Avrami model

Abstract

Time dependence of the switching current produced by reversal of domains was analysed as a function of electric field and temperature using the Avrami theory. By direct observation of the domain pattern during slow polarization reversal by means of nematic liquid crystals it was possible to reveal significant information concerning the mechanism of switching.

Analysis of the switching process in triglycine sulphate crystals based on the Avrami model

“…Microscopic observation has revealed that, in the range of electric fields in which electrical measurements were carried out, the density of the domain nuclei is so high that the linear dimension of the sample is much larger than the distance between nuclei. Ishibashi's idealized model has worked sufficiently well for previous studies in (CH 3 NH 3 ) 5 Bi 2 Br 11 single crystals [17]. Microscopic observations have revealed that the dynamics of the domain structure is similar in both single crystals.…”

Kinetics of ferroelectric switching in unipolar (CH3NH3)5Bi2Br11crystal

“…By analysing switching current data with the KAI model, the authors have been able to extract information concerning the behaviour of the switching kinetics with varying degree of success. The theory describes the switching data as well as the hysteresis loop very well for many single crystals [5][6][7]. But it has not been completely satisfactory in describing the polarization reversal in ferroelectric thin films [8,9], 3 Author to whom any correspondence should be addressed.…”

Polarization switching in (CH3NH3)5Bi2Cl11 ferroelectric crystals

“…The model works sufficiently well to explain the switching process in more homogeneous (CH 3 NH 3 ) 5 Bi 2 Br 11 crystal samples [13]. We can verify the assumptions of this model and identify the limitations to its validity in the case of inhomogeneous crystal sample (CH 3 NH 3 ) 5 Bi 2 Cl 11 .…”