Barkhausen noise in soft amorphous magnetic materials under applied stress

Details Barkhausen noise in soft amorphous magnetic materials under applied stress Barkhausen noise in soft amorphous magnetic materials under applied stress

1998-08-20

arxiv.org/abs/cond-mat/9808224v1

Physics

Condensed Matter

Materials Science

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

Scientific paper

10.1063/1.369122

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 \tau = 1.3 and \alpha = 1.5, for the decay of the distributions of jump sizes and durations.

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