Berlin 2024 – wissenschaftliches Programm

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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur

KFM 1: Tutorial: Exploring Ferroic Materials: From Modelling to Imaging Techniques (joint session KFM/TUT)

KFM 1.4: Tutorium

Sonntag, 17. März 2024, 17:45–18:15, H 1028

Exploring Ferroic Materials in 3D using Atom Probe Tomography — •Shelly Conroy — Department of Materials, London Centre for Nanotechnology, Imperial College London, London SW7 2AZ, UK

Ferroic materials can contain complex interfaces such as grain boundaries, dislocations, domain walls, and higher order topologies. Even slight changes in chemical composition can result in drastic changes in functionality such as conductivity and magnetism. As the regions of interest are often only a unit cell thick and can meander throughout the bulk material in 3D it is vital to have a characterisation method that can achieve the required spatial resolution in 3D. Atom probe tomography (APT) provides 3D compositional mapping of materials with sub-nanometre spatial resolution. In this tutorial the basics of APT characterisation will be discussed, including how to make samples, how to process APT data and specific examples of APT analysis of ferroic materials. Additionally correlative electron microscopy techniques will be detailed, and how to combine structural with chemical information from both techniques.