Barkhausen noise in soft amorphous magnetic materials under applied stress

Abstract

We report experimental measurements of Barkhausen noise on Fe_{64}Co_{21}B_{15} amorphous alloy under tensile stress. We interpret the scaling behavior of the noise distributions in terms of the depinning transition of the domain walls. We show that stress induced anisotropy enhance the effect of short-range elastic interactions that dominate over long-range dipolar interactions. The universality class is thus different from the one usually observed in Barkhausen noise measurements and is characterized by the exponents τ= 1.3 and α= 1.5, for the decay of the distributions of jump sizes and durations.

6 pages, 3 .eps figures. Submitted to the 43rd Magnetism and Magnetic Materials Conference (J. Appl. Phys.)

References in corpus (2)

• Dynamics of a ferromagnetic domain wall: avalanches, depinning transition and the Barkhausen effect
• Dynamics of a ferromagnetic domain wall and the Barkhausen effect

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