2015/09/02 by Matthias Pernpeintner, Rasmus B. Holländer, M. J. Seitner +6 · 1 citation
Materials Science · Physics and Astronomy · #Force Microscopy Techniques and Applications #Magnetic Properties and Applications #Mechanical and Optical Resonators #cond-mat.mes-hall
paper · pdf · doi:10.1063/1.4942531
arxiv created 2015/09/02 · openalex publication_date 2016/03/01 · arxiv updated 2016/03/07 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/04
We present a universal nanomechanical sensing platform for the investigation of magnetostriction in thin films. It is based on a doubly-clamped silicon nitride nanobeam resonator covered with a thin magnetostrictive film. Changing the magnetization direction within the film plane by an applied magnetic field generates a magnetostrictive stress and thus changes the resonance frequency of the nanobeam. A measurement of the resulting resonance frequency shift, e.g. by optical interferometry, allows to quantitatively determine the magnetostriction constants of the thin film. We use this method to determine the magnetostriction constants of a 10nm thick polycrystalline cobalt film, showing very good agreement with literature values. The presented technique can be useful in particular for the precise measurement of magnetostriction in a variety of (conducting and insulating) thin films, which can be deposited by e.g. electron beam deposition, thermal evaporation or sputtering.