Giant magnetostrictive nanostructured films with auto induced spin reorientation transition
Résumé
In various micro and nanosystems applications comprising magnetic films, the polarizing field still needs to be integrated. We hereby present a solution for self biasing of magnetic films using micropatterned permanent magnets. Micromagnetic simulations were used as a designing and optimization tool to create a biasing structure. Samples were elaborated with varying geometric parameters using classical silicon microfabrication techniques. Nanostructured TbCo/FeCo magnetostrictive thin films were sputtered over coercive FePt filled trenches etched in silicon. Magnetic and magnetoelastic characterizations confirmed numerical simulations. In particular, non-linear actuation of a self-biased magnetostrictive cantilever has been obtained at zero external polarizing field.
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