a) a time-dependent ferroelectric transition offers a new frame in mech. engineering studies of the ferroelectric domains' kinetics. In applications : as new class of crystal oscillators with (as an analog method of) controllable frequency, or as crystal oscillators' error correction etc.
b) materials : Pb(1-x)(Zr 0.4Ti0.6)(1-x/4)O3[1], LiMO3 (M:Nb,Os)[2] etc.
c) possible explanation might be a slow time-dependent ferroelectric transition as growth of polar nano-domains[1].
1. Time-dependent ferroelectric transition in Pb(1-x)(Zr 0.4Ti0.6)(1-x/4)O3 - XLa system https://www.researchgate.net/publication/257954307_Time-dependent_ferroelectric_transition_in_Pb1-xZr_04Ti061-x4O3_-_XLa_system
2. A ferroelectric-like structural transition in a metal http://www.nature.com/nmat/journal/v12/n11/full/nmat3754.html
Article Time-dependent ferroelectric transition in Pb(1-x)(Zr 0.4Ti0...
Such investigations help to determine the contribution of different mechanisms in the processes of relaxation (reorientation, drift), to clarify the nature of dielectric losses in ferroelectrics. The study of the delay\response rate of processes, stability characteristics is important in materials science for practical applications.
In particular, the study of the dynamics of the high-voltage polarization by Sawyer-Tower method allows to determine the amount of residual polarization by switching the direction of the dipole moment of the domains. From the time dependence of the electric induction of polarization switching, you can calculate (in model views) the high-voltage conductivity due to impurity and injected from metal electrode carriers.