Dresden 2017 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 65: Poster 2

MA 65.7: Poster

Freitag, 24. März 2017, 09:30–13:00, P2-OG1

Magnetic properties of wet-chemically prepared nanoparticles — •Adrian Jaspers, Maryam Youhannayee, and Mathias Getzlaff — Institute of Applied Physics, Heinrich-Heine-Universität, Düsseldorf, Germany

The magneto-optical Kerr effect (MOKE) is a convenient method to investigate the magnetic properties of magnetic systems such as ferromagnetic thin film and magnetic nanoparticles. In our research, a transverse magneto-optic Kerr effect (TMOKE) setup has been constructed in order to measure magnetic hysteresis loops by the intensity of a laser beam reflected of its surface. The magnetic particles consist of magnetite which have a wide application spectrum in biology and medicine. They have been prepared in a wet-chemical way (cooprecipitation) using Iron(II) sulfate and Iron(III) chloride which were mixed thoroughly initially. Subsequently, ammonium has been added for formation of magnetite nanoparticles. In the following step, a few drops of nanoparticle solution have been applied on silicon wafer and dried under vacuum condition to obtain non-oxidized homogenous samples. The measuring procedure was run by a LabVIEW program which operated a bipolar power supply attached to the magnetic coils. The setup delivered results with a good signal-to-noise ratio even without utilizing any amplification devices.