Magnetoelastic amorphous metal fluxgate magnetometer

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Magnetoelastic amorphous metal fluxgate magnetometer

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© The Institution of Electrical Engineers
Published

A fluxgate magnetometer is presented which exploits the magnetic field dependence to the stress-driven magnetisation fluctuations in magnetostrictive metallic glass ribbons. A magnetometer constructed with an unannealed ribbon, a piezoelectric ceramic driving element and a 100-turn pick-up coil exhibits a minimum detectable magnetic field of 15 nT/√Hz in the DC to 1 Hz bandwidth.

Inspec keywords: magnetic field measurement; magnetometers; magnetoelastic effects

Other keywords: piezoelectric ceramic driving element; minimum detectable magnetic field; stress-driven magnetisation fluctuations; magnetic field dependence; fluxgate magnetometer; magnetostrictive metallic glass ribbons; pick-up coil

Subjects: Magnetic variables measurement; Other magnetic material applications and devices; Sensing devices and transducers

References

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      • Livingston, J.D., Morris, W.G.: `Magnetic domains in amorphous metal ribbons', 84CRD305, General Electric report, December 1985.
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      • Mermelstein, M.D.: `High-birefringence fibre-optic polarimeter and detection of DC magnetic fields', 9th conference on optical fibre communications, February 1986, .
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      • J.D. Livingston . Magnetomechanical properties of amorphous metals. Phys. Status Solidi
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      • H.R. Hilzinger . Applications of metallic glasses in electronics industry. IEEE Trans.
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      • Bucholtz, F.: `Field annealing of metallic glass ribbons for fibre optic sensors', 3rd int. conference on optical fibre sensors, February 1985, , p. 124.
    6. 6)
      • Mermelstein, M.D.: `Coupled mode analysis for magnetoelastic amorphous metal sensors', Paper AD-8, Digest of Intermag '86, .
    7. 7)
      • K. Mohri . Magnetometers using two amorphous core multivibrator bridge. IEEE Trans.
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