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MA: Fachverband Magnetismus

MA 19: Poster I (Bio- and Molecular Magnetism/ Magnetic Particles and Clusters/ Micro- and Nanostructured Magnetic Materials/ Magnetic Materials/ Multiferroics/ Magnetic Shape Memory Alloys/ Electron Theory of Magntism/ Spincaloric Transport/ Magnetic Coupling and Exchange Bias/ Magnetization Dynamics/ Micromagnetism and Computational Magnetics)

MA 19.14: Poster

Dienstag, 15. März 2011, 10:45–13:00, P2

Electrical characterization of intermetallic FePt nanoparticles — •Ulrich Wiesenhütter¹, Jochen Grebing¹, Bernd Rellinghaus², Jürgen Fassbender¹, and Artur Erbe¹ — ¹Helmholtz-Zentrum Dresden Rossendorf, D-01328 — ²Leibniz-Institut für Festkörper- und Werkstoffforschung, D-01069

Magnetic nanoparticles have a large potential for applications such as medical diagnosis and therapy, (bio-)sensors or magnetic recording. Conventional techniques, e.g., MFM, electron holography or Lorentz microscopy are only suited to determine magnetical properties of macroscopic particle ensembles. In order to investigate the electrical and magnetic properties of a single, free-standing FePt nanoparticle two nano-sized Au electrodes, that are fabricated by electron beam lithography, are used. The full characterization of the particle is carried out by electron microscopy and by recording current-voltage characteristics. Coulomb-blockade effects, which occur at low temperatures, can be used to determine the size and the magnetic properties of the particles.