Micromachined silicon cantilevers with integrated high-frequency magnetoimpedance sensors for simultaneous strain and magnetic field detection

Giant magnetoimpedance (GMI) measurements in the high-frequency regime utilizing a coplanar waveguide with an integrated Permalloy multilayer and micromachined on a silicon cantilever are reported. The fabrication process is described in detail. The aspect ratio of the magnetic multilayer in the mag...

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Veröffentlicht in:Applied physics letters 2017-12, Vol.111 (23)
Hauptverfasser: Buettel, G., Joppich, J., Hartmann, U.
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Hartmann, U.
description Giant magnetoimpedance (GMI) measurements in the high-frequency regime utilizing a coplanar waveguide with an integrated Permalloy multilayer and micromachined on a silicon cantilever are reported. The fabrication process is described in detail. The aspect ratio of the magnetic multilayer in the magnetoresistive and magnetostrictive device was varied. Tensile strain and compressive strain were applied. Vector network analyzer measurements in the range from the skin effect to ferromagnetic resonance confirm the technological potential of GMI-based micro-electro-mechanical devices for strain and magnetic field sensing applications. The strain-impedance gauge factor was quantified by finite element strain calculations and reaches a maximum value of almost 200.
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source AIP Journals Complete; Alma/SFX Local Collection
subjects Applied physics
Aspect ratio
Compressive properties
Coplanar waveguides
Electromechanical devices
Ferromagnetic resonance
Ferromagnetism
Ferrous alloys
Finite element method
Giant magnetoimpedance
Magnetic alloys
Magnetic fields
Magnetoresistivity
Magnetostriction
Mechanical devices
Micromachining
Multilayers
Network analysers
Rangefinding
Silicon
Skin effect
Strain gauges
Tensile strain
title Micromachined silicon cantilevers with integrated high-frequency magnetoimpedance sensors for simultaneous strain and magnetic field detection
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