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MA: Fachverband Magnetismus
MA 46: Magnetic Measurement Methods
MA 46.10: Vortrag
Donnerstag, 10. März 2016, 18:00–18:15, H33
A co-resonantly coupled sensor for cantilever magnetometry — •Julia Körner1, Christopher F. Reiche1, Bernd Büchner1,2, and Thomas Mühl1 — 1Leibniz-Institut für Festkörper- und Werkstoffforschung IFW Dresden — 2Institut für Festkörperphysik, Technische Universität Dresden
Cantilever magnetometry as a technique to study magnetic properties of samples requires advances due to continuously decreasing sample size. We are presenting a novel approach based on the coupling of a micro- and a nanocantilever with matched resonance frequencies which induces a strong interplay between the two cantilevers [1]. This leads to the possibility of detecting very small magnetic interactions between a sample attached to the highly sensitive nanocantilever and an external magnetic field by measuring the oscillatory state of the microcantilever. We validated the concept by using a commercially availabe silicon cantilever as micrometer sized oscillator and an iron filled carbon nanotube as nanocantilever. Our measurements show an increase in signal strength by several orders of magnitude compared to cantilever magnetometry experiments with similar nanomagnets. With this experiment we do not only demonstrate the functionality of our sensor design but also its potential for very sensitive magnetometry measurements while maintaining a facile oscillation detection with a conventional microcantilever setup [2].
[1] Reiche, Körner et al., Nanotechnology 26 (335501), 2015
[2] Körner et al., submitted to Nanotechnology