Berlin 2008 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 23: Poster session
MM 23.49: Poster
Dienstag, 26. Februar 2008, 14:45–18:00, Poster B
Characterization of a FePd single crystal for sensor applications — •Christoph Bechtold1, Andreas Gerber1, Manfred Wuttig2, Eckhard Quandt3, Jeff McCord4, Yiu Wai Lai4, Jörg Buschbeck4, Ludwig Schultz4, Oleg Heczko4, and Sebastian Fähler4 — 1Research Center caesar, Ludwig-Erhard-Allee 2, 53175 Bonn — 2Department of Materials Science and Engineering, University of Maryland, College Park, MD 20742 — 3Christian-Albrechts-Universität zu Kiel, Chair for Inorganic Functional Materials, Kaiserstr. 2, 24143 Kiel — 4IFW Dresden, P.O. Box 270166, 01171 Dresden
Magnetic shape memory (MSM) materials have received much attention in actuator applications due to their large strains and short response times. However, their potential as an alternative to conventional magnetostrictors in sensor systems has not been studied so far. A FePd single crystal was characterized by EDX, VSM, DSC and temperature dependent XRD analysis. The magnetic field induced strain under different compressive loads was studied at temperatures ranging from 0 to -40°C and magnetic field induced actuation and twin boundary movement were confirmed and quantified by temperature dependent optical observation in the austenitic and martensitic state. Additional features of the role of magnetic domains on the MSM repsonse will be presented.
Funding through the DFG priority program SPP1239 and the National Science Foundation, grant DMR0354740, MW is gratefully acknowledged. We also thank Prof. Kakeshita and Dr. Fukuda for providing the crystal.