Dresden 2011 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 42: Poster I: Progress in Micro- and Nanopatterning: Techniques and Applications (jointly with O); Spins in Organic Materials; Ion Interactions with Nano Scale Materials; Organic Electronics and Photovoltaics; Plasmonics and Nanophotonics (jointly with HL and O); High-k and Low-k Dielectrics (jointly with DF); Organic Thin Films; Nanoengineered Thin Films; Layer Deposition Processes; Layer Properties: Electrical, Optical, and Mechanical Properties; Thin Film Characterisation: Structure Analysis and Composition; Application of Thin Films

DS 42.62: Poster

Mittwoch, 16. März 2011, 15:00–17:30, P1

Combined Quasi-Magnetoresistive Magnetic Field Sensor utilizing Magnetostriction and Quantum Tunneling — Bodo Henkel¹, Amit Kulkarni¹, •Thomas Strunskus¹, Vladimir Zaporojtchenko¹, Christoph Bechtold², Eckhard Quandt², and Franz Faupel¹ — ¹Multicomponent Materials, Institute for Materials Science, University of Kiel, Kaiserstr. 2, 24143 Kiel, Germany — ²Inorganic Functional Materials, Institute for Materials Science, University of Kiel, Kaiserstr. 2, 24143 Kiel, Germany

A new concept of magnetic field sensor was developed and characterized. It uses the combination of magnetostriction provided by a Terfenol-D substrate and quantum tunneling through a 2D gold cluster array which is in the regime near to percolation threshold. There already a small magnetically induced elongation of the Terfenol-D crystal will lead to a well measurable change of current through the cluster array. An additional feature of the specific design of the sensor is direction sensitivity with regard to external magnetic fields. The sensor was characterized in terms of sensor signal hysteresis, sensitivity, repeatability, aging behaviour and the effect of cluster embedding into the underlying polymer layer. A well defined repeatable hysteresis with a change in signal amplitude (current) of 5.50 % was achieved in first experiments. Designs for higher ratios are in progress.