High-frequency magnetoelastic materials for remote-interrogated stress sensors

Ludwig, Alfred; Tewes, M.; Glasmachers, Stefan; Löhndorf, M.; Quandt, Eckhard

doi:10.1016/s0304-8853(01)00979-9

Cited by 39 publications

(22 citation statements)

References 7 publications

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“…In previous investigations it was found that exchange coupled CoB/FeCo multilayers with individual layer thicknesses in the range of 1-15 nm are a very attractive material system for tailoring of high frequency properties in a wide range. 11,14) As an example, the increase of the cut-off frequency of such a multilayer in comparison to a CoB single layer having both the same permeability is shown in Fig. 3.…”

Section: Resultsmentioning

confidence: 98%

Magnetostrictive LC Circuit Sensors

Quandt

Frommberger

2004

Mater. Trans.

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Magnetostrictive thin films in electric resonant LC circuits are attractive as novel strain sensors. In order to achieve high resonance frequencies exchange coupled nanometer multilayers were used. LC circuits incorporating Fe 50 Co 50 /Co 80 B 20 multilayers exhibited a gauge factor ((Áf =f Þ=Á") of the order of 1000. This LC circuit sensor enables wireless interrogation, which is demonstrated in a torque measurement.

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Section: Resultsmentioning

confidence: 98%

Magnetostrictive LC Circuit Sensors

Quandt

Frommberger

2004

Mater. Trans.

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“…Fig. 23, Contactless sensor application based on magnetostrictive materials [12] Another example where the inverse magnetostrictive or magnetoimpedance effect is used in sensor applications is the remote-interrogation strain gauge [31]. When using the inverse magnetostriction effect, it is common to use films of magnetostrictive materials or amorphous multilayer of these materials.…”

Section: Magnetostrictive Contactless Torque Sensorsmentioning

confidence: 99%

“…When using the inverse magnetostriction effect, it is common to use films of magnetostrictive materials or amorphous multilayer of these materials. The instruments operate at frequencies in the range from 10MHz to 8GHz [31]. The remote-interrogation principle is shown in following graph.…”

Section: Magnetostrictive Contactless Torque Sensorsmentioning

confidence: 99%

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Design and application of magnetostrictive materials

Olabi¹,

Grunwald²

2008

Materials & Design

419

191

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Abstract:Magnetostriction is the change in shape of materials under the influence of an external magnetic field. The cause of magnetostriction change in length is the result of the rotation of small magnetic domains. This rotation and re-orientation causes internal strains in the material structure. The strains in the structure lead to the stretching (in the case of positive magnetostriction) of the material in the direction of the magnetic field. During this stretching process the cross-section is reduced in a way that the volume is kept nearly constant. The size of the volume change is so small that it can be neglected under normal operating conditions. Applying a stronger field leads to stronger and more definite re-orientation of more and more domains in the direction of magnetic field. When all the magnetic domains have become aligned with the magnetic field the saturation point has been achieved.

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“…This effect has been used to test a stress sensor using magnetostrictive thin films [5]. On the other hand, such films deposited onto compliant substrates can be tensily stressed and in situ characterized by high-frequency (HF) permeability [6], MOKE [7] and giant magnetoresistance (GMR) measurements [8]. The main purpose of these studies was also to demonstrate the feasibility of a magnetostrictive sensor on a flexible polyimide substrate.…”

Section: Introductionmentioning

confidence: 99%

In situ study of spin waves in thin films deposited onto compliant substrates submitted to external stresses

Karboul-Trojet¹,

Faurie²,

Roussigné³

et al. 2011

J. Phys. D: Appl. Phys.

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We have developed a new methodology to study the effect of mechanical stress on spin waves in thin films deposited onto compliant substrates. It is based on micro-tensile tests combined with Brillouin light scattering spectroscopy, which allows in situ probing of the magnetization dynamics of the studied film upon deformation. This paper shows from both theoretical and experimental approaches that the magneto-elastic coupling in the saturation regime leads to a simple linear relationship between the spin waves frequency and the stress applied to the magnetic film. The linear part of the experimental data can be reproduced theoretically, assuming a complete strain transfer through the metallic film-compliant substrate interface.

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High-frequency magnetoelastic materials for remote-interrogated stress sensors

Cited by 39 publications

References 7 publications

Magnetostrictive LC Circuit Sensors

Magnetostrictive LC Circuit Sensors

Design and application of magnetostrictive materials

In situ study of spin waves in thin films deposited onto compliant substrates submitted to external stresses

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