We experimentally investigate the average shapes of magnetization avalanches with the goal to understand the origin of their time asymmetry. We performed measurements on amorphous and polycrystalline magnetic materials, showing that the asymmetry can depend on several parameters, such as the applied field rate, and the duration and size of the avalanche itself. We suggest, as a possible explanation, to investigate the effect of the eddy currents on the measured signal.
Time asymmetry of magnetic noise / G. Durin, C. Castellano, F. Colaiori, S. Zapperi (PROCEEDINGS OF SPIE, THE INTERNATIONAL SOCIETY FOR OPTICAL ENGINEERING). - In: Fluctuations and Noise in Materials / [a cura di] D. Popovic, M.B. Weissman, Z.A. Racz. - [s.l] : SPIE, 2004. - ISBN 0819453927. - pp. 4-12 (( Intervento presentato al 2. convegno Conference on Fluctuations and Noise in Materials tenutosi a Maspalomas nel 2004.
Time asymmetry of magnetic noise
S. Zapperi
2004
Abstract
We experimentally investigate the average shapes of magnetization avalanches with the goal to understand the origin of their time asymmetry. We performed measurements on amorphous and polycrystalline magnetic materials, showing that the asymmetry can depend on several parameters, such as the applied field rate, and the duration and size of the avalanche itself. We suggest, as a possible explanation, to investigate the effect of the eddy currents on the measured signal.
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