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Magnetoelasticity of Co25Fe75 thin films



Daniel Schwienbacher, Matthias Pernpeintner, Lukas Liensberger, Eric R. Edwards, Hans Nembach, Justin Shaw, Mathias Weiler, Rudolf Gross, Hans Huebl


We investigate the magnetoelastic properties of Co25Fe75 and Co10Fe90 thin films by measuring the mechanical properties of a doubly clamped string resonator covered with multilayer stacks containing these films. For the magnetostrictive constants, we find λCo25Fe75 = (-20.68 +/- 0.25) x 10-6 and λCo10Fe90 = (-9.80 +/- 0.12) x 10-6 at room temperature, in contrast to the positive magnetostriction previously found in bulk CoFe crystals. Co25Fe75 thin films unite low damping and sizable magnetostriction and are thus a prime candidate for micromechanical magnonic applications, such as sensors and hybrid phonon-magnon systems.
Journal of Applied Physics


magnetoelasticity, thin films, mechanical properties, double clamped, string resonator, micromechanical magnonic, sensors, hybrid phonon-magnon


Schwienbacher, D. , Pernpeintner, M. , Liensberger, L. , Edwards, E. , Nembach, H. , Shaw, J. , Weiler, M. , Gross, R. and Huebl, H. (2019), Magnetoelasticity of Co<sub>25</sub>Fe<sub>75</sub> thin films, Journal of Applied Physics, [online],, (Accessed April 24, 2024)
Created August 19, 2019, Updated October 12, 2021