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Proceedings Paper

Time-asymmetry and non-Gaussian pinning field statistics in Barkhausen noise experiments
Author(s): Andrea C. Mills; Frank M. Hess; Michael B. Weissman
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Paper Abstract

We review the two main theoretical frameworks for understanding Barkhausen noise and other avalanche-like phenomena. We show that while the theories predict a response which is symmetric in time, various measurements show a persistent time-asymmetry. In the ABBM model, assuming Gaussian pinning field statistics guarantees time-symmetric Barkhausen noise. On the other hand, our recent experiments show non-Gaussianity in the effective pinning field of an amorphous soft metallic ferromagnet. We suggest a possible connection between the non-Gaussianity of the pinning field and the observed time asymmetries.

Paper Details

Date Published: 9 May 2003
PDF: 8 pages
Proc. SPIE 5112, Noise as a Tool for Studying Materials, (9 May 2003); doi: 10.1117/12.496987
Show Author Affiliations
Andrea C. Mills, Univ. of Illinois/Urbana-Champaign (United States)
Frank M. Hess, Univ. of Illinois/Urbana-Champaign (United States)
Michael B. Weissman, Univ. of Illinois/Urbana-Champaign (United States)

Published in SPIE Proceedings Vol. 5112:
Noise as a Tool for Studying Materials
Michael B. Weissman; Nathan E. Israeloff; A. Shulim Kogan, Editor(s)

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