Dresden 2014 – scientific programme

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MM: Fachverband Metall- und Materialphysik

MM 55: Nanomaterials III - Electronic, magnetic and optical properties

MM 55.4: Talk

Thursday, April 3, 2014, 12:45–13:00, IFW B

Electrical characterization of single FePt nanoparticles — •Ulrich Wiesenhütter¹, Darius Pohl², Bernd Rellinghaus², Jürgen Fassbender¹, and Artur Erbe¹ — ¹Helmholtz-Zentrum Dresden Rossendorf, D-01328 — ²Leibniz-Institut für Festkörper- und Werkstoffforschung, D-01069

In order to correlate the size and crystallinity of FePt nanoparticles to their electrical properties, single nanoparticles are contacted to electric leads using electron beam lithography. The particles are prepared from gas phase on electron transparent SiN membranes which allow for imaging the electrically investigated particle by means of transmission electron microscopy. The electrical characterization is carried out by recording current-voltage characteristics. As a result, Coulomb-blockade effects were observed at low temperatures which is in agreement with the dimensions obtained from the TEM studies. Individual properties of the particle - electrode junctions, i.e., capacitances and coupling parameters were derived from reconstructed Coulomb-blockade diamonds.