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J. Kosel, L. Mehnen, E. Kaniusas, H. Pfützner, T Meydan, M Vazquez, M. Rohn, A.M. Merlo, B Marquardt:
"Theoretical investigation of magnetostrictive bilayers sensitive to bending or temperature changes";
Poster: 3rd IEEE Conference on Sensors (IEEE Sensors 2004), Vienna, Austria; 10-24-2004 - 10-27-2004; in: "IEEE Sensors 2004 - Book of Abstracts", (2004), 227 - 228.

This paper concerns theoretical investigations of the bending sensitivity and the temperature sensitivity of magnetostrictive bilayer materials, the basic element of novel multifunctional sensor families. The bilayers consist of a magnetostrictive layer and a non-magnetic counter layer. In the here discussed case, there is an additional agglutination layer as a result from the production procedure. The sensitivity is determined by the stress in the magnetostrictive layer induced due to bending or temperature changes. With approximate analytic models, it is shown that the sensitivity depends on several specific layer parameters, e.g. Youngs modulus, thermal expansion coefficient and size dimensions. The influence of the agglutination layer was studied in more detail by means of two dimensional finite element analysis. The results provide an indication for the optimal bilayer composition for specific sensor applications.