2025/01/14 by E. Puppin, Maurizio Zani, E. Pinotti · 1 voice
Engineering · #Metallic Glasses and Amorphous Alloys
paper · doi:10.1109/tmag.2025.3529742
openalex publication_date 2025/01/14 · openalex created_date 2025/01/15 · openalex updated_date 2026/07/29
Magnetization reversals taking place in ferromagnetic materials can be detected using pickup coils wrapped around the sample, the so-called Barkhausen noise (BN). The voltage peaks induced in the coils depend both on the valueΔ Mof each magnetization reversal and on the attenuationV(x)of the inductive signal after traveling a distance x inside the material. Here, we present a procedure for obtainingV(x)starting from the BN induced in two pickup coils separated by a distance variable between 2 and 40 mm. This procedure starts from the experimental values of R, the ratio of the signals induced in coincidence by the same magnetization reversal in the two coils, measured in a thin amorphous ribbon of Fe63B64Si8Ni15. Working with the signal ratio allows us to get rid of the dependency onΔ M. A mathematical model for extractingV(x)from the histogram of the measured values of R is presented.