Dresden 2009 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
MA: Fachverband Magnetismus
MA 36: Magnetic Particles and Clusters II
MA 36.3: Vortrag
Donnerstag, 26. März 2009, 15:45–16:00, HSZ 401
Micro Hall Magnetometry on individual iron filled carbon nanotubes — •Kamil Lipert1, Franziska Wolny1, Thomas Mühl1, Pintu Das2, Jens Müller2, Rüdiger Klingeler1, and Bernd Büchner1 — 1Leibniz-Institute for Solid State and Materials Research (IFW) Dresden — 2Max Planck Institute for Chemical Physics of Solids (MPI-CPfS) Dresden
We present the fabrication and structural characterization of a gated (Al,Ga)As Micro- Hall device and its application for studying the magnetic properties of iron filled carbon nanotubes. The nanomagnets have been positioned in the center of the active area of 800*800nm2 by means of a Scanning Electron Microscope (SEM) equipped with micromanipulators. The Hall-voltage was measured under applied magnetic fields up to 1T at temperatures 5K ≤ T≤ 90K in the ballistic regime. The z-component of the stray field of the nanomagnet has been extracted and the magnetisation reversal has been studied in detail. Interestingly, we found unusual multi-step hysteresis curves which can be tentatively explained by magnetic field induced bending of the freestanding carbon nanotube. This might open the possibility of practical application as for example a nano-switch.