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DS: Fachverband Dünne Schichten

DS 17: Poster: Trends in Ion Beam Technology, Magnetism in Thin Films, Functional Oxides, High-k Dielectric Materials, Semiconductor Nanophotonics, Nanoengineered Thin Films, Layer Deposition Processes, Layer Growth, Layer Properties, Thin Film Characterisation, Metal and Amorphous Layers, Application of Thin Films

DS 17.48: Poster

Dienstag, 26. Februar 2008, 09:30–13:30, Poster A

Soft Magnetic nanocomposite films for high frequency applications — •Amit Kulkarni¹, Henry Greve¹, Andreas Gerber², Ulrich Schürmann², Vladimir Zaporojtchenko¹, Eckhard Quandt², and Franz Faupel¹ — ¹Chair for Multicomponent Materials, Institute for Materials Science, Christian-Albrechts University at Kiel, Kaiserstr. 2, Kiel, Germany, 24143. — ²Chair for Inorganic Functional Materials, Institute for Materials Science, Christian-Albrechts University at Kiel, Kaiserstr. 2, Kiel, Germany, 24143.

Advances in mobile communication have stimulated research on high frequency magnetic components. Nanocomposites with either a particulate or a multilayer nanostructure are promising candidates and could play an important role in such magnetic high frequency applications. Thin multilayer films of sputtered PTFE (Teflon) and Fe₅₄Ni₂₇Co₁₉ with different layer thicknesses were prepared by vapor-phase tandem deposition. These films are several hundred nanometers thick and consist of Fe₅₄Ni₂₇Co₁₉ as ferromagnetic and a fluoropolymer as the insulating material component. So far we were able to obtain cut-off frequencies up to 5 GHz and HF-permeabilities above 100 for the multilayer nanostructured films. In addition to a Teflon dielectric, FeCoV- TiO₂ / TiO₂ nanocomposite multilayer system were prepared with a very thin isolation layer of TiO₂. Both approaches proved to be promising as novel high frequency components up to the GHz range.