Barkhausen Noise — Avalanche Statistics

A ferromagnet with random pinning fields driven by slowly increasing external field H. Domain walls snap in avalanches, generating Barkhausen noise pulses with power-law size distribution P(s) ~ s^−τ (τ ≈ 1.5 near criticality).

Parameters

Disorder R: 1.00 Drive rate dH/dt: 0.008 J (coupling): 1.50 Grid size: 40

Statistics

H field: 0.00

Magnetization M: -

Avalanche count: 0

Last size: 0

τ exponent: ~1.5

Color Key

■ Spin up (+1)

■ Spin down (-1)

■ Active avalanche