Regensburg 2019 – scientific programme
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MA: Fachverband Magnetismus
MA 46: Magnetic particles and clusters
MA 46.1: Talk
Thursday, April 4, 2019, 11:30–11:45, H52
Magnetic properties of nanocomposite Fe/Gem thin films — •Thomas Reisinger, Cahit Benel, Gleb Iankevich, Ralf Witte, Di Wang, Leonardo Estrada, Robert Kruk, and Horst Hahn — Karlsruhe Institute of Technology, Institute of Nanotechnology, Eggenstein-Leopoldshafen, Germany
The functional properties of nanocomposites promise to meet many of the demanding material requirements faced by the modern high-tech industry. However, precise control over features such as chemistry, morphology and microstructure, as well as their preparation under well-defined conditions remain challenging. Here we show that the combination of size-selective cluster-ion-beam deposition and physical vapor deposition under ultra-high-vacuum conditions provides an excellent platform for the single-step synthesis of nanocomposite thin films with well-defined features such as for example cluster size and cluster concentration. In particular, we have used this method to prepare Fe/Gem nanocomposite thin films with three different Fe cluster sizes (500, 1000, and 1500 Fe atoms per cluster and a spread in the mass distribution of less than 10%) and a range of Fe volume concentration (3-20 vol. %). The influence of these parameters on blocking temperature and saturation magnetization at low temperatures have been characterized using SQUID magnetometry. Further characterization of the chemistry, morphology and microstructure of the films has been investigated using transmission electron microscopy, X-ray photo-electron spectroscopy and energy-dispersive X-ray spectroscopy.