Nonlinear magnetization reversal of Co-based amorphous microwires induced by an ac current

The magnetization reversal of ferromagnetic Co-based (CoFeSiB) amorphous microwires carrying ac current is studied. The frequency spectra of the voltage V sub phi N induced in the pick-up coil wound around the microwires were analysed and were found to depend on the ac current amplitude I sub 0 and...

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Bibliographic Details
Published in:Journal of physics. D, Applied physics Applied physics, 2001-03, Vol.34 (5), p.752-757
Main Authors: Antonov, A S, Buznikov, N A, Iakubov, I T, Lagarkov, A N, Rakhmanov, A L
Format: Article
Language:English
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Summary:The magnetization reversal of ferromagnetic Co-based (CoFeSiB) amorphous microwires carrying ac current is studied. The frequency spectra of the voltage V sub phi N induced in the pick-up coil wound around the microwires were analysed and were found to depend on the ac current amplitude I sub 0 and external longitudinal dc magnetic field H sub e . The even harmonics are shown to dominate in the frequency spectra of V sub phi N if the ac current amplitude exceeds some threshold value, which strongly depends on H sub e . A high sensitivity of the even harmonic amplitudes to the longitudinal dc field is demonstrated. The experimental data are described in terms of the Faraday law and the quasi-static Stoner-Wohlfarth model. The results obtained may be of importance for the design of weak magnetic field sensors.
ISSN:0022-3727
1361-6463
DOI:10.1088/0022-3727/34/5/314