Cited 0 times in
Anomalous domain periodicity observed in ferroelectric PbTiO3 nanodots having 180 degrees stripe domains
- Anomalous domain periodicity observed in ferroelectric PbTiO3 nanodots having 180 degrees stripe domains
- Issue Date
- Journal Title
- SCIENTIFIC REPORTS
- NATURE PUBLISHING GROUP
- 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.
- AB-INITIO, FILMS, DEPOLARIZATION, DEPENDENCE, PARTICLES, ENERGY
- Article Type
- Appears in Collections
- Division of Advanced Materials Science (AMS) (첨단재료과학부) > 1. Journal Papers
Files in This Item:
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.