Monte Carlo Simulation of a Random-Field Ising Antiferromagnet

Abstract

Phase transitions in the three-dimensional diluted Ising antiferromagnet in an applied magnetic field are analyzed numerically. It is found that random magnetic field in a system with spin concentration below a certain threshold induces a crossover from second-order phase transition to first-order transition to a new phase characterized by a spin-glass ground state and metastable energy states at finite temperatures.

10 pages, 11 figures

References in corpus (2)

• Critical Exponents of the Three Dimensional Random Field Ising Model
• Critical Exponents of the Three Dimensional Random Field Ising Model

Cited by in corpus (4)

• On the nature of the phase transition in the three-dimensional random field Ising model
• Quasi-stationary criticality of the Order-Parameter of the d=3 Random-Field Ising Antiferromagnet Fe(0.85)Zn(0.15)F2: A Synchrotron X-ray Scattering Study
• Low-energy excitations in the three-dimensional random-field Ising model
• Study of the low-temperature behavior of a disordered antiferromagnet with random fields by the parallel-tempering method