Regensburg 2022 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur
KFM 8: Crystallography in Materials Science, Microstructure and Dielectric Properties
KFM 8.6: Vortrag
Montag, 5. September 2022, 16:55–17:15, H7
Hidden order in ferroelectric oxide thin films — •Joohee Bang1, Nives Strkalj2, Martin Sarott1, Morgan Trassin1, and Thomas Weber1 — 1Department of Materials Science, ETH Zurich, Zurich, Switzerland — 2Department of Materials Science and Metallurgy, Cambridge University, Cambridge, United Kingdom
Nontrivial polar topologies such as flux-closure, vortex-antivortex pair, and skyrmions in ferroelectric thin films have recently garnered much interest as they have implications for the creation of new states of matter and hold promise for alternative device configurations for microelectronics [1]. These observations called for an in-depth structural investigation of the material as the polarization states such as orientation and domain architecture define the macroscopic ferroelectric properties in ferroelectric thin films. In fact, characterization of local order in such films using noninvasive probes is important as it not only allows access to the polarization states in the bulk, but also tracks structural local order. Here, we present a newly discovered local order state on ferroelectric lead titanate and dielectric strontium titanate superlattices from a comprehensive reciprocal space investigation analyzed with three-dimensional delta pair distribution function (3D-ΔPDF) method [2]. The structural analysis was performed by collecting a complete three-dimensional diffuse X-ray scattering data, which, to the best of our knowledge, was used for the first time to study local order in single-crystalline thin films.
[1]Yadav, A., et al. 2016
[2]Weber and Simonov 2012