We show that switching in ferroelectric lead germanate and lead iron tantalate zirconate titanate (PZTFT) does not resemble the equilibrium domain structure evolution of the Landau-Lifshitz-Kittel model but is instead highly nonequilibrium and similar, respectively, to the Richtmyer-Meshkov instability in liquids and the Helfrich-Hursault sliding instability in liquid crystals. The resulting nano-domain structures in PZTFT are circular or parabolic and involving folding bifurcations. These may have an undesirable impact on ferroelectric thin-film memoriesthat are also ferroelastic.
@article{arxiv.1606.03586,
title = {Hydrodynamics of Domain Walls in Multiferroics: Impact on Memory Devices},
author = {James F. Scott and Donald M. Evans and J. Marty Gregg and Alexei Gruverman},
journal= {arXiv preprint arXiv:1606.03586},
year = {2016}
}
Comments
17 pp, three multi-part figures; 35 references; unpublished