Evolution of 180°, 90°, and vortex domains in ferroelectric films

Roy, Manas Kumar; Sarkar, Shamik; Dattagupta, Sushanta
November 2009
Applied Physics Letters;11/9/2009, Vol. 95 Issue 19, p192905
Academic Journal
A Landau-like theory of phase transition and its time-dependent generalization are shown to be sufficient for describing the formation and kinetics of 180°, 90°, and vortex (toroidal) domains in ferroelectric thin films. The theory relies only on the choice of boundary conditions and does not require at the outset the presence of either anisotropy or strain fields. An ingredient in the calculational scheme is the incorporation of finite element methods in the kinetic equations for the ferroelectric order parameter.


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