We investigate the microstructural evolution in a ferroelectric to antiferroelectric phase transition at the morphotropic phase boundary in the Bi(1-x)SmxFeO3 system. Continuous Sm3+ substitution on the A-site induces short-range anti-parallel cation displacements as verified by the appearance of localized 1/4(110) weak spots in selected area electron diffraction patterns for 0.1<x<0.14 samples, and thus onset of antiferroelectricity. Kinetic Monte Carlo simulations confirm that increasing the strength of the anti-parallel interactions (i.e. increasing x) induces a ferroelectric to antiferroelectric transition. For 0.14<x<0.2 antiphase oxygen octahedra tilts induce complete antiferroelectricity.
@article{arxiv.0803.0777,
title = {Complex phase mixture and domain superstructure across a new lead-free ferroelectric/anti-ferroelectric morphotropic phase boundary},
author = {C. -J. Cheng and S. H. Lim and S. Fujino and W. R. McKenzie and V. Nagarajan and P. R. Munroe and I. Takeuchi and L. Salamanca-Riba and I. B. Misirlioglu},
journal= {arXiv preprint arXiv:0803.0777},
year = {2008}
}
Comments
withdrawn due to new results and journal requirements