Berlin 2012 – scientific programme

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MA: Fachverband Magnetismus

MA 39: Micro- and Nanostructured Magnetic Materials I

MA 39.1: Talk

Thursday, March 29, 2012, 09:30–09:45, EB 202

Room Temperature Magnetometry of an Individual Iron Filled Carbon Nanotube Acting as Nanocantilever — •Stefan Philippi, Uhland Weißker, Thomas Mühl, Albrecht Leonhardt, and Bernd Büchner — Leibniz Institut für Festkörper- und Werkstoffforschung, Dresden, Deutschland

The influence of external magnetic fields on the bending vibration of a one-side clamped iron filled carbon nanotube (CNT) has been analyzed theoretically and experimentallywith particular consideration to the changes in the resonance frequency. The model involves the application of a modified Euler-Bernoulli-beam to analyze the zero field oscillatory behaviour as well as a magnetostatic approach to determine the influence of any external field distributions. The experiments were conducted in situ in a scanning electron microscope. The measured magnetic moment of the nanowire at room temperature was µ =2.1 · 10⁻¹⁴   Am². Due to the favorable geometry of the CNT oscillator, the raw signal using this approach is significantly more favourable than state of the art cantilever magnetometry. The obtained good agreement between model and experiment provides a valuable basis for the development of nanoelectromechanical systems where magnetic interactions are relevant.