Dresden 2006 – wissenschaftliches Programm
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MA: Magnetismus
MA 14: Magnetic Thin Films II
MA 14.4: Vortrag
Dienstag, 28. März 2006, 11:00–11:15, HSZ 03
Soft magnetic vapor phase co-deposited polymer-metal nanocomposites for high frequency applications — •Henry Greve1, Vladimir Zaporojtchenko1, Michael Frommberger2, Eckhard Quandt2, and Franz Faupel1 — 1Chair for Multicomponent Materials, CAU Kiel, Kaiserstr. 2, 24143 Kiel, Germany — 2Smart Materials Group, caesar, Ludwig-Erhard-Allee 2, 53175 Bonn, Germany
Recent growing markets for mobile communication handsets and portable information tools require further miniaturization and lower insertion losses for inductive components installed in Monolithic Micowave Integrated Circuits (MMIC). The possible carrier frequency range is from 800 MHz to 3 GHz. Due to potential size reduction, improved quality factor and reduced magnetic stray fields, thin-film inductors will be better than air-core spirals if loss generation in the magnetic film is low at the frequency of interest. Two main loss mechanisms, eddy currents and ferromagnetic resonance (FMR), limit the applicability of soft magnetic films at frequencies ≥ 1 GHz. Two component nanocomposites with either a particulate or a multilayer nanostructure could play important roles in such high frequency applications. Here, we present a vapor phase co-deposition method in which we prepare such particulate or multilayer structured, softmagnetic nanocomposite films. These films are several hundred nanometers thick and consist of Fe54Ni27Co19 as ferromagnetic and a fluoropolymer as the insulating material component. Up to now we obtained cut-off frequencies above 2 GHz and hf-permeabilities above 100 for the multilayer films.