The effect of surface on the power spectrum of the Barkhausen noise in ferromagnetic materials
- 1 June 1974
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Magnetics
- Vol. 10 (2), 115-117
- https://doi.org/10.1109/tmag.1974.1058345
Abstract
The Barkhausen noise power spectrum was investigated on laminated polycrystalline toroids of Fe and 4% SiFe as a function of sample thickness; that is, of surface-to-volume ratio. Upon decreasing the thickness strong variations of spectrum shape are observed-the cut-off frequency increases and the spectral density drops in the very-low-frequency range. On the other hand, only negligible variations of static magnetic properties are observed. According to a recent theory, the results are explained assuming that a change of thickness directly affects the number of elementary pulses clustering into a large Barkhausen discontinuity. The calculated variations of the spectrum intensity and cut-off frequency are in good agreement with the experimental results.Keywords
This publication has 3 references indexed in Scilit:
- The power spectrum of the barkhausen noise of grain-oriented three-percent silicon ironIEEE Transactions on Magnetics, 1966
- Power Spectrum of the Barkhausen Noise of Various Magnetic MaterialsJournal of Applied Physics, 1963
- Kopplungen zwischen Barkhausen‐Sprüngen als Folge magnetischer NachwirkungAnnalen der Physik, 1959