Regensburg 2013 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 50: Poster II
MA 50.3: Poster
Freitag, 15. März 2013, 10:30–13:30, Poster D
Magnetometry on the nanometer scale using nanogranular tunnel resistors prepared by focused electron-beam-induced deposition — •Peter Gruszka, Marcel Winhold, Christian H. Schwalb, and Michael Huth — Physikalisches Institut, Goethe-Universität, Max-von-Laue-Str.1, 60438 Frankfurt am Main
By using conventional methods of magnetometry one can experience difficulties when having small amounts of sample materials. Our novel approach uses focused electron-beam-induced deposition (FEBID) for the realization of small magnetic structures using the precursor Co2(CO)8 (Dicobaltoctacarbonyl). The magnetic structures are deposited on thin cantilever structures that are equipped with nanogranular tunnel resistors (NTRs) at the bending edge of the cantilever also prepared by FEBID.[1] Applying an external magnetic field to the cantilever induces a magnetic torque resulting in a deflection of the cantilever that can be measured due to a resistance change of the NTR sensor elements. The all-electric measurement enables us to measure precisely the temperature dependent magnetic properties of sample volumes as small as 1 µm3.
[1] Schwalb et al., Sensors 2010, 10, 9847-9856