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Article Dans Une Revue Review of Scientific Instruments Année : 2021

From magneto-elastic impedance model to accurate magneto-mechanical coefficient measurements

Résumé

The measurement of the magneto-elastic impedance enables the magneto-mechanical coefficient of amorphous tapes, for example, to be accurately estimated. We first propose an analytical model describing the principle of a resonator based on magnetostrictive ribbons. We show how, from the impedance described by a circle in the complex plane, the characteristics of a magnetostrictive resonator can be established and estimated from the evolution of the impedance as a function of frequency. This method, which is entirely implemented with an amorphous metal ribbon (Metglas™ 2826), is perfectly adapted to estimate the magneto-mechanical coupling coefficient k33 and thus establish the magnetostriction curves λ(H) of amorphous ribbons. However, application to thick nickel foil shows that the current method is restricted to magnetic materials in a thin ribbon form (<∼100 µm). It should also be noted that this technique has serious advantages over those commonly used: it is non-destructive, inexpensive, and very easy to use.
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Dates et versions

hal-04107255 , version 1 (26-05-2023)

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Y. Le Bras, J.-M. Greneche. From magneto-elastic impedance model to accurate magneto-mechanical coefficient measurements. Review of Scientific Instruments, 2021, 92 (3), pp.035004. ⟨10.1063/5.0030312⟩. ⟨hal-04107255⟩
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