Volume 86, Number 5, June 2009
Article Number 56003
Number of page(s) 5
Section Condensed Matter: Structural, Mechanical and Thermal Properties
Published online 12 June 2009
EPL, 86 (2009) 56003
DOI: 10.1209/0295-5075/86/56003

Random-field Ising model in and out of equilibrium

Y. Liu and K. A. Dahmen

Department of Physics, University of Illinois at Urbana-Champaign - Urbana, IL 61801, USA

received 4 March 2009; accepted in final form 18 May 2009; published June 2009
published online 12 June 2009

We present numerical studies of zero-temperature Gaussian random-field Ising model (zt-GRFIM) in both equilibrium and non-equilibrium. We compare the universal quantities in 3D (avalanche critical exponents and scaling functions, fractal dimensions, and anisotropy measures) for the equilibrium and non-equilibrium disorder-induced phase transitions. We show compelling evidence that the two transitions belong to the same universality class.

64.60.Ht - Dynamic critical phenomena.
75.60.Ej - Magnetization curves, hysteresis, Barkhausen and related effects.

© EPLA 2009