Ferroelastic domain walls in barium titanate - quantitative phenomenological model

0322239 - FZÚ 2009 RIV GB eng J - Článek v odborném periodiku
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. E-ISSN 1607-8489
Grant CEP: GA ČR GA202/06/0411; GA ČR(CZ) GD202/05/H003; GA AV ČR 1ET300100401
Výzkumný záměr: CEZ:AV0Z10100520
Klíčová slova: ferroelectric and ferroelastic domains * BaTiO₃ * Ginzburg-Landau theory
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 0.329, rok: 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.
Trvalý link: http://hdl.handle.net/11104/0170555