Berlin 2012 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 7: Joint Session "FePt Nanoparticles" (jointly with DS, MM), Organization: Michael Farle (Univ. Duisburg-Essen)

MA 7.2: Topical Talk

Montag, 26. März 2012, 15:30–16:00, EB 202

Coulomb Blockade effects in FePt nanoparticles — •Artur Erbe¹, Ulrich Wiesenhütter¹, Darius Pohl², Bernd Rellinghaus², and Jürgen Fassbender¹ — ¹Helmholtz-Zentrum Dresden-Rossendorf — ²IFW Dresden

In order to correlate the size and crystallinity of FePt nanoparticles with their respective electrical and mangeto-electrical properties individual nanoparticles are contacted using electron beam lithography. The particles are prepared from gas phase on electron transparent SiN membranes which allows the transmission electron microscopy of the same nanoparticle which is characterized electrically. The fabrication results in junctions, in which single FePt nanoparticles are connected to external leads. These junctions are tested electronically by measuring the current-voltage characteristics at various gate voltages, temperatures and magnetic fields. We observe Coulomb Blockade effects which are in agreement with the dimensions obtained from the TEM studies. The results of the magnetic nanoparticles are compared to measurements taken on Au nanoparticles of similar sizes.