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

0573775 - FZÚ 2024 RIV DE eng J - Journal Article
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
R&D Projects: GA ČR(CZ) GJ20-05167Y
Institutional support: RVO:68378271
Keywords : charged domain walls * domain engineering * ferroelectrics * phase front * superdomains
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 6.2, year: 2022
Method of publishing: 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.
Permanent Link: https://hdl.handle.net/11104/0344136