The Barkhausen effect

Details The Barkhausen effect The Barkhausen effect

2004-04-21

arxiv.org/abs/cond-mat/0404512v1

"The Science of Hysteresis", vol. II, G. Bertotti and I. Mayergoyz eds, Elsevier, Amsterdam, pp. 181-267 (2006)

Physics

Condensed Matter

Materials Science

51 pages. Review article to be published in the volume "The Science of Hysteresis", edited by G. Bertotti and I. Mayergoyz

Scientific paper

We review key experimental and theoretical results on the Barkhausen effect, focusing on the statistical analysis of the noise. We discuss the experimental methods and the material used and review recent measurements. The picture emerging from the experimental data is that Barkhausen avalanche distributions and power spectra can be described by scaling laws as in critical phenomena. In addition, there is growing evidence that soft ferromagnetic bulk materials can be grouped in different classes according to the exponent values. Soft thin films still remain to be fully explored both experimentally and theoretically. Reviewing theories and models proposed in the recent past to account for the scaling properties of the Barkhausen noise, we conclude that the domain wall depinning scenario successfully explains most experimental data. Finally, we report a translation from German of the original paper by H. Barkhausen.

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