Regensburg 2022 – scientific programme
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DS: Fachverband Dünne Schichten
DS 9: Thin Film Properties: Structure, Morphology and Composition (XRD, TEM, XPS, SIMS, RBS, AFM, ...) 3
DS 9.1: Talk
Tuesday, September 6, 2022, 09:30–09:45, H14
Structural properties of iron dichalcogenide thin films deposited by selenization process — •Luqman Mustafa1, Andreas Kreyßig1, Jill Fortmann2, Aurelija Mockute2, Alfred Ludwig2, and Anna E. Böhmer1 — 1Institute for Experimental Physics IV, Ruhr-Universität Bochum, Germany — 2Materials Discovery and Interfaces, Institute for Materials, Ruhr University Bochum, Germany
Transition-metal dichalcogenides with marcasite structure have been extensively studied for their applications in light energy conversion and photoelectrochemical devices. Lately this structure type has also gained interest for its magnetic properties as a candidate for the newly-predicted altermagnetic order.
We report on the formation of (Fe,X)Se2, (X= Co, Mn, Cr....) thin films by ex-situ selenization of amorphous transition metal thin films. Using combinatorial deposition allowed to efficiently explore a wide range of substitution at the iron site with different transition metals (for example Co, Mn, Cr). The dependence of structural properties and phase stability on the selenization temperature and substitution level has been investigated. The process may be adapted for other transition metal dichalcogenides thin films, such as FeSb2, and is therefore a unique tool to study a broad material family and its possible substitution ranges.