Peculiar domain states of cylindrical BaTiO.sub.3./sub. nanorods embedded in SrTiO.sub.3./sub. matrix

0439783 - FZÚ 2015 RIV GB eng J - Článek v odborném periodiku
Stepkova, Vilgelmina - Márton, Pavel - Hlinka, Jiří
Peculiar domain states of cylindrical BaTiO₃ nanorods embedded in SrTiO₃ matrix.
Phase Transitions. Roč. 87, 10-11 (2014), s. 922-928. ISSN 0141-1594. E-ISSN 1029-0338
Grant CEP: GA ČR GAP204/12/0232
Institucionální podpora: RVO:68378271
Klíčová slova: Ginzburg-Landau-Devonshire model * phase-field * BaTiO₃ ferroelectric nanorods
Kód oboru RIV: BE - Teoretická fyzika
Impakt faktor: 0.954, rok: 2014

Recent analysis based on the generalized Ginzburg-Landau-Devonshire model and phase-field approach predicts the formation of a simple quadruplet domain configuration in BaTiO3 nanorods embedded in epitaxial SrTiO3 film. This quadruplet configuration can have three inequivalent variants, differing by the arrangement of the out-of-plane polarization components: uniform orientation in whole nanorod, ‘up-down-up-down’ arrangement, or ‘up-up-down-down’ arrangement. In the present study, the phase-field simulations are employed to study the temporal evolution of the ‘up-down-up-down’ quadruplet domain configuration of 40-nm diameter nanorods under the out-of-plane electric field applied in a finite area within one of the four domains. We have found that this perturbation may lead to the formation of still another, six-domain arrangement, stable at zero-applied field, which is energetically more favorable than the ‘up-down-up-down’ arrangement
Trvalý link: http://hdl.handle.net/11104/0242976