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MM: Fachverband Metall- und Materialphysik

MM 58: Nanomaterials I

MM 58.3: Vortrag

Donnerstag, 23. März 2017, 10:45–11:00, IFW D

Formation of Co/SiO2 nanocomposites via dewetting of multilayer structures — •Oleksandr Polonskyi, Justin Jetter, Carsten Hänel, Thomas Strunskus, and Franz Faupel — Chair for Multicomponent Materials, Faculty of Engineering, Christian-Albrechts University at Kiel, Kaiserstr. 2, 24143 Kiel, Germany

Nanocomposite thin films with metallic nanoparticles embedded into dielectric matrix have attracted much attention for their interesting functional properties. In the current work, we focus on magnetic Co/SiO2 nanocomposites prepared via magnetron sputtering of Co-SiO2 multilayers and subsequent heat treatment, leading to formation of Co nanoparticles embedded in an SiO2 matrix via dewetting and self-organization. The influence of deposition parameters and heat treatment conditions on microstructure and properties of the resulting films was investigated. Structure and morphology of the samples were characterized by SEM and TEM. XPS was used to investigate the chemical composition of the deposited samples and for monitoring of the changes occurring during heat-treatment. Vibrating sample magnetometry (VMS) was applied for investigation of magnetic properties. The mechanism of the self-organized microstructural evolution will be discussed.