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199 results on '"Granitzer, Petra"'

18. MAGNETIC CHARACTERIZATION OF POROUS SILICON – COBALT NANOPARTICLE COMPOSITE FOR RF DEVICE APPLICATION

Author

Defforge, Thomas, Granitzer, Petra, Billoué, Jérôme, Le Borgne, Brice, Gautier, Gaël, Rumpf, Klemens, and Defforge, Thomas

Subjects
[CHIM.MATE] Chemical Sciences/Material chemistry
Abstract

We describe the preparation of porous silicon (PS) films functionalized with magnetic cobalt nanoparticles (NPs) for microelectronic device RF applications. The addition of magnetic NPs to the PS layer is expected to limit the electrical lossesof the RF inductors and therefore increase their performances. After PS formation, cobalt NPs were incorporated into thePS layer by electrochemical deposition. Different deposition conditions were experimented and the magnetic behavior ofthe PS films - Co NPs composite was characterized by VSM (Vibrating Sample Magnetometer).

Published
2022

42. Porous silicon/metal hybrid system with ferro and paramagnetic behavior

Author

Rumpf, Klemens, Granitzer, Petra, and Krenn, Heinz

Subjects
Electron paramagnetic resonance -- Analysis, Magnetic materials -- Magnetic properties, Magnetic materials -- Analysis, Business, Electronics, Electronics and electrical industries
Abstract

Fabricated ferromagnetic hybrid systems consisting of a porous silicon (PS) matrix with incorporated metal nanostructures exhibit magnetic properties which can be distinguished in two ranges. A first one is related to magnetic fields below the saturation magnetization of the deposited metal and a second one to higher magnetic fields. Considering the low field region the samples show magnetic characteristics due to the metal-precipitations (geometry, distribution, kind of metal) tunable by the deposition parameters. At higher fields an additional novel non-saturating term is observed which is dependent on the temperature and differs in strength between Ni and Co. In the frame of this work this additional paramagnetic term is experimentally investigated. Index Terms--Magnetic nanocomposite, metal deposition, non-saturation, paramagnetic term.

Published
2008

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