|About this Abstract
|MS&T23: Materials Science & Technology
|Grain Boundaries, Interfaces, and Surfaces: Fundamental Structure-Property-Performance Relationships
|Structural Defects and Functional Interfaces in Epitaxial Thin Films of Complex Oxide Materials
|Nuria Bagues, Louise Colfer, Elahe Farghadany, Michael Schmidt, Robert E. A. Williams, Alp Sehirlioglu, Lynette Keeney, David W. McComb
|On-Site Speaker (Planned)
|David W. McComb
Correlation between defect structure, interfaces and functionality offers a unique opportunity for the engineering of functional nanostructures. For example, defects such as misfit dislocations or twins that affect local physical properties in epitaxial thin films of complex oxides. Characterizing these structural defects is critical to understanding their functionality, and typically requires the use of complex and often a combination of methods. Here, we combine scanning (S)TEM imaging and spectroscopy techniques to investigate structural defects and interfaces in epitaxial thin films of complex oxides. We will present two systems of complex oxides with structural defects: (1) a rare example of a multiferroic exhibiting room-temperature (RT) properties, the Aurivillius phase Bi6TixFeyMnzO18 (B6TFMO) system, and (2) an ionic conductivity material, (Li3,Nd)TiO3 (NLTO). Combining these imaging and spectroscopy analysis, we will discuss the influence of interfaces and defects in the local chemistry and physical behavior, putting light on the possible functionality of these defects.