Avalanches, Barkhausen noise, and plain old criticality

Journal Article · Fri Dec 01 00:00:00 EST 1995 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.75.4528· OSTI ID:277355

Perkovic, O; Dahmen, K; Sethna, J P ^[1]

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1. Laboratory of Atomic and Solid State Physics, Cornell University, Ithaca, New York 14853-2501 (United States)

We explain Barkhausen noise in magnetic systems in terms of avalanches of domains near a plain old critical point in the hysteretic zero-temperature random-field Ising model. The avalanche size distribution has a universal scaling function, making nontrivial predictions of the shape of the distribution up to 50{percent} above the critical point, where two decades of scaling are still observed. We simulate systems with up to 1000{sup 3} domains, extract critical exponents in 2, 3, 4, and 5 dimensions, compare with our 2D and 6{minus}{epsilon} predictions, and compare to a variety of experiments. {copyright} {ital 1995 The American Physical Society.}

• Sponsoring Organization: USDOE
• DOE Contract Number: FG02-88ER45364
• OSTI ID: 277355
• Journal Information: Physical Review Letters, Vol. 75, Issue 24; Other Information: PBD: Dec 1995
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
MAGNETIC MATERIALS
FLUCTUATIONS
AVALANCHE QUENCHING
COMPUTERIZED SIMULATION
CRITICALITY
ISING MODEL
MAGNETIC FIELDS
NOISE
PULSED IRRADIATION
BARKHAUSEN EFFECT
CRITICAL EXPONENTS
CRITICAL POINTS