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Closed-circuit domain quadruplets in BaTiO.sub.3./sub. nanorods embedded in a SrTiO.sub.3./sub. film
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SYSNO ASEP 0427116 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Closed-circuit domain quadruplets in BaTiO3 nanorods embedded in a SrTiO3 film Author(s) Stepkova, Vilgelmina (FZU-D) RID, ORCID
Márton, Pavel (FZU-D) RID, ORCID
Setter, N. (CH)
Hlinka, Jiří (FZU-D) RID, ORCIDSource Title Physical Review. B - ISSN 1098-0121
Roč. 89, č. 6 (2014), "060101-1"-"060101-6"Number of pages 5 s. Language eng - English Country US - United States Keywords Ginzburg-Landau-Devonshire model ; phase-field approach ; nanorods ; BaTiO3/SrTiO3 heterostructures Subject RIV BM - Solid Matter Physics ; Magnetism R&D Projects GAP204/11/1011 GA ČR - Czech Science Foundation (CSF) Institutional support FZU-D - RVO:68378271 UT WOS 000332372000001 EID SCOPUS 84897622979 DOI 10.1103/PhysRevB.89.060101 Annotation Cylindrical BaTiO3 nanorods embedded in 100 -oriented SrTiO3 epitaxial film in a brushlike configuration are investigated in the framework of the Ginzburg-Landau-Devonshire model. It is shown that strain compatibility at BaTiO3/SrTiO3 interfaces keeps BaTiO3 nanorods in the rhombohedral phase even at room temperature. Depolarization field at the BaTiO3/SrTiO3 interfaces is reduced by an emission of the 109 or 71-degree domain boundaries. In case of 10–80-nm diameter nanorods, the ferroelectric domains are found to form a quadruplet with a robust flux-closure arrangement of the in-plane components of the spontaneous polarization. The out-of-plane components of the polarization are either balanced or oriented up or down along the nanorod axis. More complex stable domain configurations with coexisting clockwise and anticlockwise quadruplets contain interesting arrangement of strongly curved 71-degree boundaries. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2015
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