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| Home > Publications database > The magnetic moment of polycrystalline Co thin Films on Pt/MgO(100) |
| Poster (After Call) | FZJ-2019-00382 |
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2018
Abstract: The variation of the magnetic moment of magnetic materials with its dimensionality is a longtime studied issue. In thin films, however, additional effects may come into play, like intermixing and surface roughness. In contrast, a constant magnetic moment of the thin film is often assumed in modelling.With the help of polarised neutron reflectometry (PNR) we study this open question for polycrystalline Co thin films on 20 nm Pt/MgO(001). Sample growth by molecular beam epitaxy and PNR measurements were performed at the Heinz Maier-Leibnitz Zentrum (MLZ) in Garching, Germany.Several Co thin films between 3 and 50 were investigated at room temperature and in saturation under UHV conditions by utilising a special UHV transfer chamber. Our results reveal a vertical depth profile of the magnetic moment of the Co thin film. In fact, the magnetisation is not a constant but smeared out at the edges, due to roughness. The variation of the film thickness reveals the evolution of the magnetic moment which is separated in a bulk and a surface contribution and discussed with respect to published results.Access to PNR measurements and sample preparation with the MBE system is provided to interested people via the MLZ user office system (www.mlz-garching.de) and the nanoscience foundry and fine analysis project (www.nffa.eu) where you can also apply for funding.This project has received funding from the EU’s H2020 research and innovation programme under grant agreement n. 654360.
Keyword(s): Magnetic Materials (1st) ; Magnetism (2nd)
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