Island growth mode in pulsed laser deposited ferroelectric BaTiO3 thin films: The role of oxygen pressure during deposition. (11th June 2019)

• Record Type: Journal Article
• Authors: Estrada, Flávia R.; de Moraes, Lucas G. M.; Vital, Felipe L. A.; Neme, Maíra D.; Schio, Pedro; Mori, Thiago J. A.; Cezar, Julio C.
• Is Part Of: Ferroelectrics. Volume 545(2019)
• Page Start: 39
• Page End: 44
• Publication Date: 2019-06-11
• Subjects: Ferroelectric thin film -- barium titanate -- misfit strain -- crystalline defects -- epitaxial thin film; Ferroelectricity -- Periodicals; Ferroelectric crystals -- Periodicals; 537
• DOI: 10.1080/00150193.2019.1621709
• Languages: English
• ISSNs: 0015-0193

Abstract

Abstract: Pulsed laser deposition is widely used to grow BaTiO3 thin films. We investigated the influence of oxygen pressure during growth on the topography, microstructure, and roughness of ferroelectric epitaxial BaTiO3 thin films. It also presented an analysis of the epitaxial growth mode and defects throughout the film thickness using aberration-corrected transmission electron microscopy. Although ferroelastic (twin boundary) domain walls are absent, several misfit dislocations were observed and might be the primary cause of the observed island growth mode.