Mechano-encephalogram based on amorphous wire micro SI acceleration sensor

Shen, Liang; Mohri, K.; Abudukelimu, Abuduwaili; Aoyama, H.

doi:10.1109/20.951036

Cited by 9 publications

(2 citation statements)

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“…It was reported that CoSiB amorphous wires with a helical anisotropy have a strain gauge factor of 12002000 at 110 MHz. 8 These unique magnetic and ac transport properties make amorphous wire elements suitable for a wide range of applications: magnetic sensors for low field detection, 9,10 highly sensitive stress sensors, 11,12 radio frequency wireless sensors 13 and tunable microwave composite materials. [14][15][16] The present paper further advances this field of research by investigating the effect of applied tensile stress on MI in CoMnSiB amorphous wires at microwave frequencies and proposing new stress-sensitive microwave materials.…”

Section: Introductionmentioning

confidence: 99%

Stress effect on magnetoimpedance in amorphous wires at gigahertz frequencies and application to stress-tunable microwave composite materials

Panina¹,

Sandacci²,

Makhnovskiy³

2004

Journal of Applied Physics

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 The effect of tensile stress on magnetoimpedance (MI) in CoMnSiB amorphous wires at microwave frequencies (0.53 GHz) is investigated both experimentally and theoretically. In the presence of the dc bias magnetic field of the order of the anisotropy field, the impedance shows very large and sensitive change when the wire is subjected to a tensile stress: 100% and 60% per 180 MPa for frequencies 500 MHz and 2.5 GHz, respectively. It is demonstrated that this behavior owes mainly to the directional change in the equilibrium magnetization caused by the applied stress and field, which agrees well with the theoretical results for the surface impedance. This stress effect on MI is proposed to use for creating microwave stress-tunable composite materials containing short magnetic wires. The analysis of the dielectric response from such materials shows that depending on the stress level in the material, the dispersion of the effective permittivity can be of a resonant or relaxation type with a considerable change in its values (up to 100% at 600 MPa). This media can be used for structural stress monitoring by microwave contrast imaging. a)

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Section: Introductionmentioning

confidence: 99%

Stress effect on magnetoimpedance in amorphous wires at gigahertz frequencies and application to stress-tunable microwave composite materials

Panina¹,

Sandacci²,

Makhnovskiy³

2004

Journal of Applied Physics

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“…Biomedical applications. Other significant applications of sensors based on magnetic materials and effects are the biomedical applications [164][165][166][167][168][169]. The most traditional sensing system is the encephalograph, an arrangement of field sensor arrays able to detect fields in the range of 10 pT.…”

Section: Industrial Applicationsmentioning

confidence: 99%

Magnetostrictive delay lines: engineering theory and sensing applications

Hristoforou

2003

Meas. Sci. Technol.

113

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A review of the engineering theory and the sensing element applications of the magnetostrictive delay line (MDL) technique is presented. The state of the art of magnetic materials and effects used in sensor design is overviewed and the operation of MDLs and their basic engineering properties are discussed. The resulting position, stress and field sensors based on this technique as well as their most significant applications are demonstrated. Finally, the industrialization process and the integration of the sensors with electronic circuitry as well as their evaluation with respect to the state of the art are discussed.

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Modeling of torsion stress giant magnetoimpedance in amorphous wires with negative magnetostriction

Buznikov

Kim

2007

Journal of Magnetism and Magnetic Materials

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A model describing the influence of torsion stress on the giant magnetoimpedance in amorphous wires with negative magnetostriction is proposed. The wire impedance is found by means of the solution of Maxwell equations together with the Landau−Lifshitz equation, assuming a simplified spatial distribution of the magnetoelastic anisotropy induced by the torsion stress. The impedance is analyzed as a function of the external magnetic field, torsion stress and frequency. It is shown that the magnetoimpedance ratio torsion dependence has an asymmetric shape, with a sharp peak at some value of the torsion stress. The calculated field and stress dependences of the impedance are in qualitative agreement with results of the experimental study of the torsion stress giant magnetoimpedance in Co-based amorphous wires.

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Mechano-encephalogram based on amorphous wire micro SI acceleration sensor

Cited by 9 publications

References 1 publication

Stress effect on magnetoimpedance in amorphous wires at gigahertz frequencies and application to stress-tunable microwave composite materials

Stress effect on magnetoimpedance in amorphous wires at gigahertz frequencies and application to stress-tunable microwave composite materials

Magnetostrictive delay lines: engineering theory and sensing applications

Modeling of torsion stress giant magnetoimpedance in amorphous wires with negative magnetostriction

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