Domain size effects in Barkhausen noise

TL;DR

This paper investigates how finite size effects influence Barkhausen noise, combining theoretical modeling and experimental measurements to challenge previous interpretations of avalanche size distributions.

Contribution

It demonstrates that cutoff phenomena in avalanche sizes are due to finite size effects, not self-organized criticality, through combined simulation and experimental evidence.

Findings

Cutoff in avalanche size distribution is caused by finite size effects.

Experimental results support simulation findings.

Challenges previous claims of self-organized criticality in Barkhausen noise.

Abstract

The possible existence of self-organized criticality in Barkhausen noise is investigated theoretically through a single interface model, and experimentally from measurements in amorphous magnetostrictive ribbon Metglas 2605TCA under stress. Contrary to previous interpretations in the literature, both simulation and experiment indicate that the presence of a cutoff in the avalanche size distribution may be attributed to finite size effects.