Regensburg 2010 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 36: Thin Film Characterisation: Structure Analyse and Composition (XRD, TEM, XPS, SIMS, RBS, ...) I

DS 36.6: Vortrag

Donnerstag, 25. März 2010, 10:45–11:00, H8

Structure of Co/Pt multilayers on gold particle arrays — •Herbert Schletter¹, Carsten Schulze¹, Denys Makarov¹, Alan Craven², Sam McFadzean², Manfred Albrecht¹, and Michael Hietschold¹ — ¹Institute of Physics, Chemnitz University of Technology, 09107 Chemnitz — ²Department of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, Scotland, UK

Nanostructuring of thin films is used in a variety of applications and attracts scientific as well as technological interest. One way to realize such structuring is by using particle arrays as templates onto which the films are deposited [1]. In the present study, gold particles with diameters of 20 nm to 60 nm are used to implement this concept. A 17 nm thick Co/Pt multilayer film with out-of-plane magnetic anisotropy was deposited onto these particles. Besides magnetic characterisation, a detailed structural investigation is essential for the understanding of magnetic properties. In this regard, SEM was used to analyze the particle assembly as well as the surface morphology of the film. Further details about the magnetic films were gathered with cross sectional TEM and EELS Spectrum Imaging. It was found, that for 60 nm and 40 nm particles, the magnetic layer forms a closed film which follows the morphology of the particle arrangement. In contrast to that, on 20 nm particles the roughness of the magnetic film is of the same size as the height variations induced by the particles. These findings allowed conclusions about magnetic coupling behaviour and served to clarify differences found in the magnetization reversal process.

[1] M. Albrecht et al., Nature Materials 4 (2005) 203.