Dynamical Properties of Random Field Ising Model

Abstract

Extensive Monte Carlo simulations are performed on a two-dimensional random field Ising model. The purpose of the present work is to study the disorder-induced changes in the properties of disordered spin systems. The time evolution of the domain growth, the order parameter and spin-spin correlation functions are studied in the non equilibrium regime. The dynamical evolution of the order parameter and the domain growth shows a power law scaling with disorder-dependent exponents. It is observed that, except for very small random fields, exchange interaction never wins over pinning interaction to establish long range order.

8 pages, 9 figures, Final and accepted version in Phys. Rev. E

References in corpus (3)

• Crossover in Growth Law and Violation of Superuniversality in the Random Field Ising Model
• Finite size scaling in Ising-like systems with quenched random fields: Evidence of hyperscaling violation
• Short-time domain-wall dynamics in the random-field Ising model with a driving field