Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2010-04-12
Phys. Rev. E 81, 041138 (2010)
Physics
Condensed Matter
Statistical Mechanics
14 pages, 7 figures, accepted for publication in Phys. Rev. E
Scientific paper
We study a nonequilibrium Ising model that stochastically evolves under the simultaneous operation of several spin-flip mechanisms. In other words, the local magnetic fields change sign randomly with time due to competing kinetics. This dynamics models a fast and random diffusion of disorder that takes place in dilute metallic alloys when magnetic ions diffuse. We performe Monte Carlo simulations on cubic lattices up to L=60. The system exhibits ferromagnetic and paramagnetic steady states. Our results predict first-order transitions at low temperatures and large disorder strengths, which correspond to the existence of a nonequilibrium tricritical point at finite temperature. By means of standard finite-size scaling equations, we estimate the critical exponents in the low-field region, for which our simulations uphold continuous phase transitions.
Crokidakis Nuno
No associations
LandOfFree
Nonequilibrium phase transitions and tricriticality in a three-dimensional lattice system with random-field competing kinetics does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Nonequilibrium phase transitions and tricriticality in a three-dimensional lattice system with random-field competing kinetics, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Nonequilibrium phase transitions and tricriticality in a three-dimensional lattice system with random-field competing kinetics will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-280250