Regensburg 2004 – wissenschaftliches Programm
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DS: Dünne Schichten
DS 22: Postersitzung
DS 22.29: Poster
Dienstag, 9. März 2004, 14:30–17:00, Poster B
Preparation and characterization of a Teflon AF/Fe-Ni-Co nanocomposite for magnetic UHF applications — •H. Greve1, U. Saeed1, A. Biswas1, J. Kanzow1, V. Zaporojtchenko1, F. Faupel1, M. Frommberger2, and E. Quandt2 — 1Lehrstuhl für Materialverbunde, Technische Fakultät der CAU, Kaiserstr. 2, 24143 Kiel — 2CAESAR, Ludwig-Erhard-Allee 2, 53175 Bonn
Nanocomposites of finely dispersed magnetic nanoparticles in a polymer matrix can be tailored to achieve the requirements for future GHz frequency inductive component applications. Principle requirements for such soft magnetic films are a high saturation magnetization Ms, a low but finite anisotropic field and minimized eddy-current losses. We describe solvent-free preparation of Teflon AF/Fe-Ni-Co nanocomposite by coevaporation. Analysis of the magnetic properties and morphology as function of the filling factor was done by TEM, EDX, VSM and complex AC permeability measurements. Films with filling factors of ∼20 % show a narrow particle size distribution of 6-8 nm, a high Ms ∼2 Tesla and a cut-off frequency > 1 GHz. It is shown that the atomic composition of the alloy remains constant after evaporation.