Regensburg 2022 – scientific programme
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MA: Fachverband Magnetismus
MA 19: Poster 1
MA 19.27: Poster
Tuesday, September 6, 2022, 17:30–20:00, P2
Magnetic proximity effect in V uncovered by TEM techniques — •Inga Ennen1, Daniela Ramermann1, 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
Thin film structures consisting of magnetic and non-magnetic materials are of great technical interest, due to their special magnetic and electronic characteristics. These characteristics were influenced e.g. by the interface quality and the magnetic proximity effect. Here, the penetration depth of magnetism in non-magnetic films adjacent to ferromagnetic layers is investigated, usually by employing X-ray techniques such as XRMR. In this contribution, we demonstrate the opportunities of modern transmission electron microscopy techniques for the investigation of the magnetic proximity effect in a V/Fe thin film system as a model sample. Here, a combination of magnetic differential phase contrast (DPC) and electron energy loss magnetic chiral dichroism (EMCD) has been employed. The basic idea is that DPC measures the presence of a magnetic induction into V and EMCD shows that there is a magnetic moment present. In this way, a magnetic proximity effect of about 1.5nm in V has been observed, which is in accordance to corresponding measurements with X-rays.