Hysteresis of the resonance frequency of magnetostrictive bending cantilevers

Journal article
(Original article)

Publication Details

Author(s): Löffler M, Kremer R, Sutor A, Lerch R
Journal: Journal of Applied Physics
Publication year: 2015
Volume: 117
Journal issue: 17
ISSN: 1089-7550
Language: English


Magnetostrictive bending cantilevers are applicable for wirelessly measuring physical quantities such as pressure and strain. Exploiting the ΔE-effect, the resonance frequency of the cantilevers is shifted because of a change in the magnetic biasing field. The biasing field, in turn, depends on the applied pressure or strain, respectively. With a view to the application as a reliable sensor, maximum sensitivity but minimum hysteresis in the biasing field/resonance frequency dependence is preferred. In this contribution, monomorph bending cantilevers fabricated using magnetostrictive FeCoV and Metglas 2605SA1 are investigated regarding their applicability for future sensors. For this purpose, the biasing field-dependent polarization of the magnetostrictive materials and bending of the cantilevers are determined. Furthermore, a setup to magnetically bias the cantilevers and determine the bending resonance frequency is presented. Here, the resonance frequency is identified by measuring the impulse response employing a laser Doppler vibrometer. The measurement results reveal that cantilevers made of FeCoV possess a distinct hysteretic behaviour at low magnetic biasing field magnitudes. This is ascribed to the polarization and bending hysteresis. Cantilevers fabricated using Metglas 2605SA1 feature a lower resonance frequency shift compared to cantilevers with FeCoV, which would result in a lower sensitivity of the sensor. However, their resonance frequency hysteresis is almost negligible.

FAU Authors / FAU Editors

Lerch, Reinhard Prof. Dr.-Ing.
Lehrstuhl für Sensorik
Löffler, Michael
Lehrstuhl für Sensorik
Sutor, Alexander Dr.-Ing.
Lehrstuhl für Sensorik

How to cite

Löffler, M., Kremer, R., Sutor, A., & Lerch, R. (2015). Hysteresis of the resonance frequency of magnetostrictive bending cantilevers. Journal of Applied Physics, 117(17). https://dx.doi.org/10.1063/1.4916162

Löffler, Michael, et al. "Hysteresis of the resonance frequency of magnetostrictive bending cantilevers." Journal of Applied Physics 117.17 (2015).


Last updated on 2018-13-07 at 02:23