SKM 2023 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 23: Poster Magnetism I

MA 23.42: Poster

Dienstag, 28. März 2023, 17:00–19:00, P1

Analysing the Domain Structure of a Thin Film and a GMR Stack with Magnetic Transmission Electron Microscopy — •Judith Bünte, Björn Büker, Daniela Ramermann, Inga Ennen, and Andreas Hütten — Universität Bielefeld, Dünne Schichten und Physik der Nanostrukturen, Universitätsstr. 25, 33615 Bielefeld, Germany

The Transmission Electron Microscope (TEM) can be used to image magnetic domains in magnetic samples. Two prominent techniques for magnetic imaging are Differential Phase Contrast (DPC) and Lorentz Microscopy (LTEM). Both techniques base on the Lorentz force inside the magnetic domain of a specimen which deflects the transmitted electron beam depending on the orientation of the corresponding magnetic field. This deflected beam results in a different intensity distribution in the recorded image which can be analysed.

In this contribution both the DPC and the LTEM technique are used to image the magnetic landscape of two different model systems: One sample consists of pure cobalt, while the other sample is a nanostructured multilayer CoFe/Co/Ru sample. While the domains of the pure cobalt sample are unbound, the nanostructure inside the multilayer sample yields an interesting domain structure, which is constrained to the structure of the sample. Both samples are analysed quantitatively to draw conclusions regarding the characteristics of the samples through the measurements.