Anomalous domain periodicity observed in ferroelectric PbTiO3 nanodots having 180 degrees stripe domains
SCIE
SCOPUS
- Title
- Anomalous domain periodicity observed in ferroelectric PbTiO3 nanodots having 180 degrees stripe domains
- Authors
- Son, JY; Song, S; Lee, JH; Jang, HM
- Date Issued
- 2016-05-26
- Publisher
- NATURE PUBLISHING GROUP
- Abstract
- Nanometer-scale ferroelectric dots and tubes have received a great deal of attention owing to their potential applications to nonvolatile memories and multi-functional devices. As for the size effect of 180 degrees stripe domains in ferroelectric thin films, there have been numerous reports on the thickness-dependent domain periodicity. All these studies have revealed that the domain periodicity (w) of 180 degrees stripe domains scales with the film thickness (d) according to the classical Landau-Lifshitz-Kittel (LLK) scaling law (w proportional to d(1/2)) down to the thickness of -2 nm. In the case of PbTiO3 nanodots, however, we obtained a striking correlation that for the thickness less than a certain critical value, d(c) (-35 nm), the domain width even increases with decreasing thickness of the nanodot, which surprisingly indicates a negative value in the LLK scaling-law exponent. On the basis of theoretical considerations of dc, we attributed this anomalous domain periodicity to the finite lateral-size effect of a ferroelectric nanodot with an additional effect possibly coming from the existence of a thin non-ferroelectric surface layer.
- Keywords
- AB-INITIO; FILMS; DEPOLARIZATION; DEPENDENCE; PARTICLES; ENERGY
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/29997
- DOI
- 10.1038/SREP26644
- ISSN
- 2045-2322
- Article Type
- Article
- Citation
- SCIENTIFIC REPORTS, vol. 6, 2016-05-26
- Files in This Item:
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