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O: Fachverband Oberflächenphysik

O 41: Poster Tuesday: Nanostructures

O 41.10: Poster

Dienstag, 2. April 2019, 18:00–20:00, Poster D

Melting behavior of FeNi nanoparticles on surfaces — •Mahboobeh Ravankhah and Mathias Getzlaff — Institute of Applied Physics, University Duesseldorf

Magnetic nanoparticles have received great attention due to their application in biomedicine and magnetic recording. The 3d bimetallic nanoparticles such as FeNi have much more complex magnetic and structural phases under different conditions. Therefore, it is important to investigate structure dependence on temperature and stoichiometry. FeNi alloy nanoparticles are prepared by a magnetron sputtering source and an Arc Cluster Ion Source (ACIS). Two different FeNi alloys are used: high purity Fe0.50Ni0.50 and Fe0.75Ni.25. All nanoparticles are prepared under UHV condition on W (110) surface, therefore contaminations are avoided. We report on the influence of different parameters like size of nanoparticles, stoichiometry and annealing temperature on the melting behavior. Particle's size, shape and structure will be investigated by Transmission Electron Microscopy (TEM), Scanning Tunneling Microscopy (STM) and Low Energy Electron Diffraction (LEED).