Charged domain walls in BaTiO.sub.3./sub. crystals emerging from superdomain boundaries

0573775 - FZÚ 2024 RIV DE eng J - Článek v odborném periodiku
Bednyakov, Petr - Hlinka, Jiří
Charged domain walls in BaTiO₃ crystals emerging from superdomain boundaries.
Advanced Electronic Materials. Roč. 9, č. 6 (2023), č. článku 2300005. ISSN 2199-160X. E-ISSN 2199-160X
Grant CEP: GA ČR(CZ) GJ20-05167Y
Institucionální podpora: RVO:68378271
Klíčová slova: charged domain walls * domain engineering * ferroelectrics * phase front * superdomains
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 6.2, rok: 2022
Způsob publikování: Open access

The present in situ optical observations allow the documentation of the early stage of the poling process of barium titanate crystals in which the cubic and ferroelectric phases coexist, the latter being broken into multiple martensitic superdomains, separated by superdomain boundaries. It is revealed that the transient superdomains are subsequently converted into the regular ferroelectric domains, while the superdomain boundaries transform into the charged domain walls. In order to assign the observed transient domain patterns, to understand the shapes of the observed ferroelectric precipitates and their agglomerates as well as to provide the overall interpretation of the recorded domain formation process, the implications of the mechanical compatibility of the coexisting superdomain states are derived in the framework of the Wechsler–Lieberman–Read theory.
Trvalý link: https://hdl.handle.net/11104/0344136