Time-asymmetry and non-Gaussian pinning field statistics in Barkhausen noise experiments

Andrea C. Mills; Frank M. Hess; Michael B. Weissman

doi:10.1117/12.496987

9 May 2003 Time-asymmetry and non-Gaussian pinning field statistics in Barkhausen noise experiments

Andrea C. Mills, Frank M. Hess, Michael B. Weissman

Proceedings Volume 5112, Noise as a Tool for Studying Materials; (2003) https://doi.org/10.1117/12.496987
Event: SPIE's First International Symposium on Fluctuations and Noise, 2003, Santa Fe, New Mexico, United States

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.

Citation Download Citation

Andrea C. Mills, Frank M. Hess, and Michael B. Weissman "Time-asymmetry and non-Gaussian pinning field statistics in Barkhausen noise experiments", Proc. SPIE 5112, Noise as a Tool for Studying Materials, (9 May 2003); https://doi.org/10.1117/12.496987

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