Regensburg 2022 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
MA: Fachverband Magnetismus
MA 2: Magnetic Imaging Techniques
MA 2.2: Vortrag
Montag, 5. September 2022, 09:45–10:00, H37
Using electron microscopic methods to evaluate the magnetic proximity effect — •Daniela Ramermann1,3, Inga Ennen1, Dominik Graulich1, Trevor Almeida2, Stephen McVitie2, Björn Büker1, Timo Kuschel1, and Andreas Hütten1 — 1Universität Bielefeld, Dünne Schichten und Physik der Nanostrukturen, Universitätsstr. 25, 33615 Bielefeld, Germany — 2University of Glasgow, School of Physics and Astronomy, Glasgow G12 8QQ, UK — 3Max Planck Institute for Chemical Energy Conversion, Stiftstraße 34-36, 45470 Mülheim an der Ruhr
Magnetic proximity effects are part of spintronic, superconducting, excitonic and topological phenomena which can induce desired or parasitic effects in measurements and devices. They are induced by a ferromagnet in a layer of a material close to the Stoner criterion in proximity to the ferromagnet. Usually magnetic proximity effects are studied by X-ray techniques. Modern analytical electron microscopy can be used to analyse the same underlying effects as well as electronic structure properties of materials. Therefore, it can be used to investigate the proximity effect in thin film systems.
As a model system a V/Fe thin film sample has been chosen. The techniques of electron energy loss magnetic chiral dichroism (EMCD) and differential phase contrast (DPC) have been used in combination. EMCD is used to show the presence of a magnetic moment on the material and DPC to locate the magnetic induction with high accuracy. Thus, we were able to observe a magnetic proximity effect of about 1.5 nm in V, which is in agreement with X-Ray measurements.