Domain walls of ferroelectric BaTiO3.sub.3./sub. within the Ginzburg-Landau-Devonshire phenomenological model

0354433 - FZÚ 2011 RIV US eng J - Journal Article
Márton, Pavel - Rychetský, Ivan - Hlinka, Jiří
Domain walls of ferroelectric BaTiO3₃ within the Ginzburg-Landau-Devonshire phenomenological model.
Physical Review. B. Roč. 81, č. 14 (2010), 144125/1-144125/11. ISSN 1098-0121
R&D Projects: GA ČR GA202/09/0430; GA ČR GAP204/10/0616
Institutional research plan: CEZ:AV0Z10100520
Keywords : ferroelectric * ferroelastic * domain walls * perovskite * phenomenological model
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 3.772, year: 2010

Mechanically compatible and electrically neutral domain walls in tetragonal, orthorhombic, and rhombohedral ferroelectric phases of BaTiO3 are systematically investigated in the framework of the phenomenological Ginzburg-Landau-Devonshire model. Polarization and strain profiles within domain walls are calculated numerically and within an approximation leading to the quasi-one-dimensional analytic solutions. Domain-wall thicknesses and energy densities are estimated for all mechanically compatible and electrically neutral domain-wall species in the entire temperature range of ferroelectric phases. The calculation indicates that the lowest-energy structure of the 109° wall and few other domain walls in the orthorhombic and rhombohedral phases resemble Bloch walls known from magnetism.
Permanent Link: http://hdl.handle.net/11104/0193434