Dresden 2009 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 40: Poster II: Bio- and Molecular Magnetism (1-9); Magnetic Coupling Phenomena/Exchange Bias (10-15); Magnetic Particlicles and Clusters (16-29); Micro and Nanostructured Magnetic Materials (30-51); Multiferroics (52-64); Spin Injection in Heterostructures (65-67); Spin-Dyn./Spin-Torque (68-93); Spindependent Transport (94-108)

MA 40.82: Poster

Freitag, 27. März 2009, 11:00–14:00, P1A

Interdigital transducers for surface acoustic wave radiation onto ferromagnetic films — •Rupert Huber, Bernhard Botters, Sebastian Neusser, and Dirk Grundler — Lehrstuhl für Physik funktionaler Schichtsysteme Technische Universität München, Physik Department, James Franck Straße 1, 85747 Garching

We introduce our work on the design and fabrication of an emitter-receiver configuration of interdigital transducers (IDT). This system is assembled on the piezoelectrical crystal Lithium Niobate as substrate material, radiating surface acoustic waves (SAW). Encouraged by simulations with SYNC [1] we design IDTs matched to a 50 Ohm circuit. We test them at frequencies from 100 MHz up to the GHz regime by a vector network analyzer (VNA). In the propagation path of the SAWs we introduce a ferromagnetic film. We control the magnetic state with an external magnetic field. The SAWs are expected to distort the ferromagnetic film. We aim at measuring the transmitted SAWs depending on the magnetization state oft he film. We acknowledge support from the German Excellence Cluster "Nanosystems Initiative Munich".

[1] http://www.sawlab.te.chiba-u.ac.jp/~ken/freesoft.html