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Ferroelastic domain walls in barium titanate - quantitative phenomenological model

  1. 1. 0322239 - FZU-D 2009 RIV GB eng J - Journal Article
    Hlinka, Jiří - Márton, Pavel
    Ferroelastic domain walls in barium titanate - quantitative phenomenological model.
    [Feroelastické doménové stěny v titanátu bária - kvantitativní fenomenologický model.]
    Integrated Ferroelectrics. Roč. 101, č. 1 (2009), s. 50-62 ISSN 1058-4587
    R&D Projects: GA ČR GA202/06/0411; GA ČR(CZ) GD202/05/H003; GA AV ČR 1ET300100401
    Institutional research plan: CEZ:AV0Z10100520
    Keywords : ferroelectric and ferroelastic domains * BaTiO3 * Ginzburg-Landau theory
    Subject RIV: BM - Solid Matter Physics ; Magnetism
    Impact factor: 0.329, year: 2009

    Properties of ferroelecric domain walls corresponding to rotations of the spontaneous electric polarization by 90 or 180 degrees are investigated in the framework of material-specific generalized Ginzburg-Landau-Devonshire model involving long-range dipole-dipole interactions. Thickness and surface energy for these domain walls in the tetragonal and the orthorhombic phases of BaTiO3 are evaluated in the charge-free approximation using model parameters determined from independent experiments. Both types of domain walls occur spontaneously in domain pattern simulations, although in the orthorhombic phase the 180-degree domain walls are very rare. The simulated domain patterns and domain wall properties are discussed and the relation to the pronounced anisotropy of the gradient term is pointed out.

    Byly provedeny simulace analytické výpočty vlastností devadesátistupňových a stoosmdesátistupňových doménových stěn v BaTiO3.
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